Continuum mechanics

Contact mechanics: History

Contact mechanics
When a sphere is pressed against an elastic material, the contact area increases.

Classical contact mechanics is most notably associated with Heinrich Hertz. In 1882, Hertz solved the contact problem of two elastic bodies with curved surfaces. This still-relevant classical solution provides a foundation for modern problems in contact mechanics. For example, in mechanical engineering and tribology, Hertzian contact stress is a description of the stress within mating parts. The Hertzian contact stress usually refers to the stress close to the area of contact between two spheres of different radii.

It was not until nearly one hundred years later that Johnson, Kendall, and Roberts found a similar solution for the case of adhesive contact. This theory was rejected by Boris Derjaguin and co-workers who proposed a different theory of adhesion in the 1970s. The Derjaguin model came to be known as the DMT (after Derjaguin, Muller and Toporov) model, and the Johnson et al. model came to be known as the JKR (after Johnson, Kendall and Roberts) model for adhesive elastic contact. This rejection proved to be instrumental in the development of the Tabor and later Maugis parameters that quantify which contact model (of the JKR and DMT models) represent adhesive contact better for specific materials.

Further advancement in the field of contact mechanics in the mid-twentieth century may be attributed to names such as Bowden and Tabor. Bowden and Tabor were the first to emphasize the importance of surface roughness for bodies in contact. Through investigation of the surface roughness, the true contact area between friction partners is found to be less than the apparent contact area. Such understanding also drastically changed the direction of undertakings in tribology. The works of Bowden and Tabor yielded several theories in contact mechanics of rough surfaces.

The contributions of Archard (1957) must also be mentioned in discussion of pioneering works in this field. Archard concluded that, even for rough elastic surfaces, the contact area is approximately proportional to the normal force. Further important insights along these lines were provided by Greenwood and Williamson (1966), Bush (1975), and Persson (2002). The main findings of these works were that the true contact surface in rough materials is generally proportional to the normal force, while the parameters of individual micro-contacts (i.e., pressure, size of the micro-contact) are only weakly dependent upon the load.

Contact mechanics: Classical solutions for non-adhesive elastic contact

The theory of contact between elastic bodies can be used to find contact areas and indentation depths for simple geometries. Some commonly used solutions are listed below. The theory used to compute these solutions is discussed later in the article.

Contact mechanics: Contact between a sphere and a half-space

Contact mechanics
Contact of an elastic sphere with an elastic half-space

An elastic sphere of radius indents an elastic half-space to depth , and thus creates a contact area of radius

The applied force is related to the displacement by

where

and , are the elastic moduli and , the Poisson's ratios associated with each body.

The distribution of normal pressure in the contact area as a function of distance from the center of the circle is

where is the maximum contact pressure given by

The radius of the circle is related to the applied load by the equation

The depth of indentation is related to the maximum contact pressure by

The maximum shear stress occurs in the interior at for .

Contact mechanics: Contact between two spheres

Contact mechanics
Contact between two spheres.
Contact mechanics
Contact between two crossed cylinders of equal radius.

For contact between two spheres of radii and , the area of contact is a circle of radius . The equations are the same as for a sphere in contact with a half plane except that the effective radius is defined as

Contact mechanics: Contact between two crossed cylinders of equal radius

This is equivalent to contact between a sphere of radius and a plane.

Contact mechanics: Contact between a rigid cylinder with flat-ended and an elastic half-space

Contact mechanics
Contact between a rigid cylindrical indenter and an elastic half-space.

If a rigid cylinder is pressed into an elastic half-space, it creates a pressure distribution described by

where is the radius of the cylinder and

The relationship between the indentation depth and the normal force is given by

Contact mechanics: Contact between a rigid conical indenter and an elastic half-space

Contact mechanics
Contact between a rigid conical indenter and an elastic half-space.

In the case of indentation of an elastic half-space of Young's modulus using a rigid conical indenter, the depth of the contact region and contact radius are related by

with defined as the angle between the plane and the side surface of the cone. The total indentation depth is given by:

The total force is

The pressure distribution is given by

The stress has a logarithmic singularity at the tip of the cone.

Contact mechanics: Contact between two cylinders with parallel axes

Contact mechanics
Contact between two cylinders with parallel axes

In contact between two cylinders with parallel axes, the force is linearly proportional to the length of cylinders L and to the indentation depth d:

The radii of curvature are entirely absent from this relationship. The contact radius is described through the usual relationship

with

as in contact between two spheres. The maximum pressure is equal to

Contact mechanics: Bearing contact

The contact in the case of bearings is often a contact between a convex surface (male cylinder or sphere) and a concave surface (female cylinder or sphere: bore or hemispherical cup).

Contact mechanics: The Method of Dimensionality Reduction

Contact mechanics
Contact between a sphere and an elastic half-space and one-dimensional replaced model.

Some contact problems can be solved with the Method of Dimensionality Reduction (MDR). In this method, the initial three-dimensional system is replaced with a contact of a body with a linear elastic or viscoelastic foundation (see Fig). The properties of one-dimensional systems coincide exactly with those of the original three-dimensional system, if the form of the bodies is modified and the elements of the foundation are defined according to the rules of the MDR. However for exact analytical results, it is required that the contact problem is axisymmetric and the contacts are compact.

Contact mechanics: Hertzian theory of non-adhesive elastic contact

The classical theory of contact focused primarily on non-adhesive contact where no tension force is allowed to occur within the contact area, i.e., contacting bodies can be separated without adhesion forces. Several analytical and numerical approaches have been used to solve contact problems that satisfy the no-adhesion condition. Complex forces and moments are transmitted between the bodies where they touch, so problems in contact mechanics can become quite sophisticated. In addition, the contact stresses are usually a nonlinear function of the deformation. To simplify the solution procedure, a frame of reference is usually defined in which the objects (possibly in motion relative to one another) are static. They interact through surface tractions (or pressures/stresses) at their interface.

As an example, consider two objects which meet at some surface in the (,)-plane with the -axis assumed normal to the surface. One of the bodies will experience a normally-directed pressure distribution and in-plane surface traction distributions and over the region . In terms of a Newtonian force balance, the forces:

must be equal and opposite to the forces established in the other body. The moments corresponding to these forces:

are also required to cancel between bodies so that they are kinematically immobile.

Contact mechanics: Assumptions in Hertzian theory

The following assumptions are made in determining the solutions of Hertzian contact problems:

  • The strains are small and within the elastic limit.
  • The surfaces are continuous and non-conforming (implying that the area of contact is much smaller than the characteristic dimensions of the contacting bodies).
  • Each body can be considered an elastic half-space.
  • The surfaces are frictionless.

Additional complications arise when some or all these assumptions are violated and such contact problems are usually called non-Hertzian.

Contact mechanics: Analytical solution techniques

Contact mechanics
Contact between two spheres.

Analytical solution methods for non-adhesive contact problem can be classified into two types based on the geometry of the area of contact. A conforming contact is one in which the two bodies touch at multiple points before any deformation takes place (i.e., they just "fit together"). A non-conforming contact is one in which the shapes of the bodies are dissimilar enough that, under zero load, they only touch at a point (or possibly along a line). In the non-conforming case, the contact area is small compared to the sizes of the objects and the stresses are highly concentrated in this area. Such a contact is called concentrated, otherwise it is called diversified.

A common approach in linear elasticity is to superpose a number of solutions each of which corresponds to a point load acting over the area of contact. For example, in the case of loading of a half-plane, the Flamant solution is often used as a starting point and then generalized to various shapes of the area of contact. The force and moment balances between the two bodies in contact act as additional constraints to the solution.

Contact mechanics: Point contact on a (2D) half-plane

Contact mechanics
Schematic of the loading on a plane by force P at a point (0,0).

A starting point for solving contact problems is to understand the effect of a "point-load" applied to an isotropic, homogeneous, and linear elastic half-plane, shown in the figure to the right. The problem may be either plane stress or plane strain. This is a boundary value problem of linear elasticity subject to the traction boundary conditions:

where is the Dirac delta function. The boundary conditions state that there are no shear stresses on the surface and a singular normal force P is applied at (0,0). Applying these conditions to the governing equations of elasticity produces the result

for some point, , in the half-plane. The circle shown in the figure indicates a surface on which the maximum shear stress is constant. From this stress field, the strain components and thus the displacements of all material points may be determined.

Contact mechanics: Line contact on a (2D) half-plane

Contact mechanics: Normal loading over a region

Suppose, rather than a point load , a distributed load is applied to the surface instead, over the range . The principle of linear superposition can be applied to determine the resulting stress field as the solution to the integral equations:

Contact mechanics: Shear loading over a region

The same principle applies for loading on the surface in the plane of the surface. These kinds of tractions would tend to arise as a result of friction. The solution is similar the above (for both singular loads and distributed loads ) but altered slightly:

These results may themselves be superposed onto those given above for normal loading to deal with more complex loads.

Contact mechanics: Point contact on a (3D) half-space

Analogously to the Flamant solution for the 2D half-plane, fundamental solutions are known for the linearly elastic 3D half-space as well. These were found by Boussinesq for a concentrated normal load and by Cerruti for a tangential load. See the section on this in Linear elasticity.

Contact mechanics: Numerical solution techniques

Distinctions between conforming and non-conforming contact do not have to be made when numerical solution schemes are employed to solve contact problems. These methods do not rely on further assumptions within the solution process since they base solely on the general formulation of the underlying equations . Besides the standard equations describing the deformation and motion of bodies two additional inequalities can be formulated. The first simply restricts the motion and deformation of the bodies by the assumption that no penetration can occur. Hence the gap between two bodies can only be positive or zero

where denotes contact. The second assumption in contact mechanics is related to the fact, that no tension force is allowed to occur within the contact area (contacting bodies can be lifted up without adhesion forces). This leads to an inequality which the stresses have to obey at the contact interface. It is formulated for the normal stress .

At locations where there is contact between the surfaces the gap is zero, i.e. , and there the normal stress is different than zero, indeed, . At locations where the surfaces are not in contact the normal stress is identical to zero; , while the gap is positive, i.e., . This type of complementarity formulation can be expressed in the so-called Kuhn–Tucker form, viz.

These conditions are valid in a general way. The mathematical formulation of the gap depends upon the kinematics of the underlying theory of the solid (e.g., linear or nonlinear solid in two- or three dimensions, beam or shell model). By restating the normal stress in terms of the contact pressure, , i.e., the Kuhn-Tucker problem can be restated as in standard complementarity form, i.e.

In the linear elastic case the gap can be formulated as
where is the rigid body separation, is the geometry/topography of the contact (cylinder and roughness) and is the elastic deformation/deflection. If the contacting bodies are approximated as linear elastic half spaces, the Boussinesq-Cerruti integral equation solution can be applied to express the deformation () as a function of the contact pressure (), i.e.,
where
for line loading of an elastic half space and
for point loading of an elastic half-space.

After discretization the linear elastic contact mechanics problem can be stated in standard Linear Complementarity Problem (LCP) form.

where is a matrix, whose elements are so called influence coefficients relating the contact pressure and the deformation. The strict LCP formulation of the CM problem presented above, allows for direct application of well-established numerical solution techniques such as Lemke's pivoting algorithm. The Lemke algorithm has the advantage that it finds the numerically exact solution within a finite number of iterations. The MATLAB implementation presented by Almqvist et al. is one example that can be employed to solve the problem numerically. In addition, an example code for an LCP solution of a 2D linear elastic contact mechanics problem has also been made public at MATLAB file exchange by Almqvist et al.

Contact mechanics: Contact between rough surfaces

When two bodies with rough surfaces are pressed into each other, the true contact area is much smaller than the apparent contact area . The mechanics of contacting rough surfaces are discussed in terms of normal contact mechanics and static frictional interactions. Natural and engineering surfaces typically exhibit roughness features, known as aperities, across a broad range of length scales down to the molecular level, with surface structures exhibiting self affinity, also known as surface fractality. It is recognized that the self affine structure of surfaces is the origin of the linear scaling of true contact area with applied pressure and the consequent linearity of the relationship between static friction and applied normal force.

In contact between a "random rough" surface and an elastic half-space, the true contact area is related to the normal force by

with equal to the root mean square (also known as the quadratic mean) of the surface slope and . The median pressure in the true contact surface

can be reasonably estimated as half of the effective elastic modulus multiplied with the root mean square of the surface slope .

For the situation where the asperities on the two surfaces have a Gaussian height distribution and the peaks can be assumed to be spherical, the average contact pressure is sufficient to cause yield when where is the uniaxial yield stress and is the indentation hardness. Greenwood and Williamson defined a dimensionless parameter called the plasticity index that could be used to determine whether contact would be elastic or plastic.

The Greenwood-Williamson model requires knowledge of two statistically dependent quantities; the standard deviation of the surface roughness and the curvature of the asperity peaks. An alternative definition of the plasticity index has been given by Mikic. Yield occurs when the pressure is greater than the uniaxial yield stress. Since the yield stress is proportional to the indentation hardness , Micic defined the plasticity index for elastic-plastic contact to be

In this definition represents the micro-roughness in a state of complete plasticity and only one statistical quantity, the rms slope, is needed which can be calculated from surface measurements. For , the surface behaves elastically during contact.

In both the Greenwood-Williamson and Mikic models the load is assumed to be proportional to the deformed area. Hence, whether the system behaves plastically or elastically is independent of the applied normal force.

Contact mechanics: Adhesive contact between elastic bodies

When two solid surfaces are brought into close proximity, they experience attractive van der Waals forces. Bradley's van der Waals model provides a means of calculating the tensile force between two rigid spheres with perfectly smooth surfaces. The Hertzian model of contact does not consider adhesion possible. However, in the late 1960s, several contradictions were observed when the Hertz theory was compared with experiments involving contact between rubber and glass spheres.

It was observed that, though Hertz theory applied at large loads, at low loads

  • the area of contact was larger than that predicted by Hertz theory,
  • the area of contact had a non-zero value even when the load was removed, and
  • there was strong adhesion if the contacting surfaces were clean and dry.

This indicated that adhesive forces were at work. The Johnson-Kendall-Roberts (JKR) model and the Derjaguin-Muller-Toporov (DMT) models were the first to incorporate adhesion into Hertzian contact.

Contact mechanics: Bradley model of rigid contact

It is commonly assumed that the surface force between two atomic planes at a distance from each other can be derived from the Lennard-Jones potential. With this assumption

where is the force (positive in compression), is the total surface energy of both surfaces per unit area, and is the equilibrium separation of the two atomic planes.

The Bradley model applied the Lennard-Jones potential to find the force of adhesion between two rigid spheres. The total force between the spheres is found to be

where are the radii of the two spheres.

The two spheres separate completely when the pull-off force is achieved at at which point

Contact mechanics: Johnson-Kendall-Roberts (JKR) model of elastic contact

Contact mechanics
Schematic of contact area for the JKR model.
Contact mechanics
JKR test with a rigid bead on a deformable planar material: complete cycle

To incorporate the effect of adhesion in Hertzian contact, Johnson, Kendall, and Roberts formulated the JKR theory of adhesive contact using a balance between the stored elastic energy and the loss in surface energy. The JKR model considers the effect of contact pressure and adhesion only inside the area of contact. The general solution for the pressure distribution in the contact area in the JKR model is

Note that in the original Hertz theory, the term containing was neglected on the ground that tension could not be sustained in the contact zone. For contact between two spheres

where is the radius of the area of contact, is the applied force, is the total surface energy of both surfaces per unit contact area, are the radii, Young's moduli, and Poisson's ratios of the two spheres, and

The approach distance between the two spheres is given by

The Hertz equation for the area of contact between two spheres, modified to take into account the surface energy, has the form

When the surface energy is zero, , the Hertz equation for contact between two spheres is recovered. When the applied load is zero, the contact radius is

The tensile load at which the spheres are separated, i.e., , is predicted to be

This force is also called the pull-off force. Note that this force is independent of the moduli of the two spheres. However, there is another possible solution for the value of at this load. This is the critical contact area , given by

If we define the work of adhesion as

where are the adhesive energies of the two surfaces and is an interaction term, we can write the JKR contact radius as

The tensile load at separation is

and the critical contact radius is given by

The critical depth of penetration is

Contact mechanics: Derjaguin-Muller-Toporov (DMT) model of elastic contact

The Derjaguin-Muller-Toporov (DMT) model is an alternative model for adhesive contact which assumes that the contact profile remains the same as in Hertzian contact but with additional attractive interactions outside the area of contact.

The radius of contact between two spheres from DMT theory is

and the pull-off force is

When the pull-off force is achieved the contact area becomes zero and there is no singularity in the contact stresses at the edge of the contact area.

In terms of the work of adhesion

and

Contact mechanics: Tabor parameter

In 1977, Tabor showed that the apparent contradiction between the JKR and DMT theories could be resolved by noting that the two theories were the extreme limits of a single theory parametrized by the Tabor parameter () defined as

where is the equilibrium separation between the two surfaces in contact. The JKR theory applies to large, compliant spheres for which is large. The DMT theory applies for small, stiff spheres with small values of .

Subsequently Derjaguin and his collaborators by applying Bradley's surface force law to an elastic half space, confirmed that as the Tabor parameter increases, the pull-off force falls from the Bradley value to the JKR value . More detailed calculations were later done by Greenwood revealing the S-shaped load/approach curve which explains the jumping-on effect. A more efficient method of doing the calculations and additional results were given by Feng

Contact mechanics: Maugis-Dugdale model of elastic contact

Contact mechanics
Schematic of contact area for the Maugis-Dugdale model.

Further improvement to the Tabor idea was provided by Maugis who represented the surface force in terms of a Dugdale cohesive zone approximation such that the work of adhesion is given by

where is the maximum force predicted by the Lennard-Jones potential and is the maximum separation obtained by matching the areas under the Dugdale and Lennard-Jones curves (see adjacent figure). This means that the attractive force is constant for . There is not further penetration in compression. Perfect contact occurs in an area of radius and adhesive forces of magnitude extend to an area of radius . In the region , the two surfaces are separated by a distance with and . The ratio is defined as

In the Maugis-Dugdale theory, the surface traction distribution is divided into two parts - one due to the Hertz contact pressure and the other from the Dugdale adhesive stress. Hertz contact is assumed in the region . The contribution to the surface traction from the Hertz pressure is given by

where the Hertz contact force is given by

The penetration due to elastic compression is

The vertical displacement at is

and the separation between the two surfaces at is

The surface traction distribution due to the adhesive Dugdale stress is

The total adhesive force is then given by

The compression due to Dugdale adhesion is

and the gap at is

The net traction on the contact area is then given by and the net contact force is . When the adhesive traction drops to zero.

Non-dimensionalized values of are introduced at this stage that are defied as

In addition, Maugis proposed a parameter which is equivalent to the Tabor parameter . This parameter is defined as

where the step cohesive stress equals to the theoretical stress of the Lennard-Jones potential

Zheng and Yu suggested another value for the step cohesive stress

to match the Lennard-Jones potential, which leads to

Then the net contact force may be expressed as

and the elastic compression as

The equation for the cohesive gap between the two bodies takes the form

This equation can be solved to obtain values of for various values of and . For large values of , and the JKR model is obtained. For small values of the DMT model is retrieved.

Contact mechanics: Carpick-Ogletree-Salmeron (COS) model

The Maugis-Dugdale model can only be solved iteratively if the value of is not known a-priori. The Carpick-Ogletree-Salmeron approximate solution simplifies the process by using the following relation to determine the contact radius :

where is the contact area at zero load, and is a transition parameter that is related to by

The case corresponds exactly to JKR theory while corresponds to DMT theory. For intermediate cases the COS model corresponds closely to the Maugis-Dugdale solution for .

Contact mechanics: See also

  • Adhesive
  • Adhesive bonding
  • Adhesion railway
  • Adhesive surface forces
  • Bearing capacity
  • Contact dynamics
  • Dispersive adhesion
  • Electrostatic generator
  • Energetically modified cement
  • Frictional contact mechanics
  • Friction drive
  • Galling
  • Goniometer
  • Non-smooth mechanics
  • Plastic wrap
  • Rolling (metalworking)
  • Shock (mechanics)
  • Signorini problem
  • Surface tension
  • Unilateral contact
  • Wetting

Contact mechanics: References

  1. Johnson, K. L, 1985, Contact mechanics, Cambridge University Press.
  2. Popov, Valentin L., 2010, Contact Mechanics and Friction. Physical Principles and Applications, Springer-Verlag, 362 p., ISBN 978-3-642-10802-0.
  3. H. Hertz, Über die berührung fester elastischer Körper (On the contact of rigid elastic solids). In: Miscellaneous Papers. Jones and Schott, Editors, J. reine und angewandte Mathematik 92, Macmillan, London (1896), p. 156 English translation: Hertz, H.
  4. Hertz, H. R., 1882, Ueber die Beruehrung elastischer Koerper (On Contact Between Elastic Bodies), in Gesammelte Werke (Collected Works), Vol. 1, Leipzig, Germany, 1895.
  5. K. L. Johnson and K. Kendall and A. D. Roberts, Surface energy and the contact of elastic solids, Proc. R. Soc. London A 324 (1971) 301-313
  6. D. Maugis, Contact, Adhesion and Rupture of Elastic Solids, Springer-Verlag, Solid-State Sciences, Berlin 2000, ISBN 3-540-66113-1
  7. Derjaguin, BV and Muller, VM and Toporov, Y.P., 1975, Effect of contact deformations on the adhesion of particles, Journal of Colloid and Interface Science, 53(2), pp. 314-326
  8. D. Tabor, The hardness of solids, J. Colloid Interface Sci. 58 (1977) 145-179
  9. D. Maugis, Adhesion of spheres: The JKR-DMT transition using a Dugdale model, J. Colloid Interface Sci. 150 (1992) 243--269
  10. , Bowden, FP and Tabor, D., 1939, The area of contact between stationary and between moving surfaces, Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, 169(938), pp. 391--413.
  11. Bowden, F.P. and Tabor, D., 2001, The friction and lubrication of solids, Oxford University Press.
  12. Archard, JF, 1957, Elastic deformation and the laws of friction, Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, 243(1233), pp.190--205.
  13. Greenwood, JA and Williamson, JBP., 1966, Contact of nominally flat surfaces, Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, pp. 300-319.
  14. Bush, AW and Gibson, RD and Thomas, TR., 1975, The elastic contact of a rough surface, Wear, 35(1), pp. 87-111.
  15. Persson, BNJ and Bucher, F. and Chiaia, B., 2002, Elastic contact between randomly rough surfaces: Comparison of theory with numerical results, Physical Review B, 65(18), p. 184106.
  16. Hanaor, D. A. H.; Gan, Y.; Einav, I. (2015). "Contact mechanics of fractal surfaces by spline assisted discretisation". International Journal of Solids and Structures. 59: 121–131. doi:10.1016/j.ijsolstr.2015.01.021.
  17. Sneddon, I. N., 1965, The Relation between Load and Penetration in the Axisymmetric Boussinesq Problem for a Punch of Arbitrary Profile. Int. J. Eng. Sci. v. 3, pp. 47–57.
  18. Popov, V.L., Method of reduction of dimensionality in contact and friction mechanics: A linkage between micro and macro scales, Friction, 2013, v.1, N. 1, pp.41–62.
  19. Popov, V.L. and Heß, M., Methode der Dimensionsreduktion in Kontaktmechanik und Reibung, Springer, 2013.
  20. Shigley, J.E., Mischke, C.R., 1989, Mechanical Engineering Design, Fifth Edition, Chapter 2, McGraw-Hill, Inc, 1989, ISBN 0-07-056899-5.
  21. Kalker, J.J. 1990, Three-Dimensional Elastic Bodies in Rolling Contact. (Kluwer Academic Publishers: Dordrecht).
  22. Wriggers, P. 2006, Computational Contact Mechanics. 2nd ed. (Springer Verlag: Heidelberg).
  23. Laursen, T. A., 2002, Computational Contact and Impact Mechanics: Fundamentals of Modeling Interfacial Phenomena in Nonlinear Finite Element Analysis, (Springer Verlag: New York).
  24. Acary V. and Brogliato B., 2008,Numerical Methods for Nonsmooth Dynamical Systems. Applications in Mechanics and Electronics. Springer Verlag, LNACM 35, Heidelberg.
  25. Popov, Valentin L., 2009, Kontaktmechanik und Reibung. Ein Lehr- und Anwendungsbuch von der Nanotribologie bis zur numerischen Simulation, Springer-Verlag, 328 S., ISBN 978-3-540-88836-9.
  26. Cottle, R.; Pang, J.; Stone, R. (2009-01-01). The Linear Complementarity Problem. Classics in Applied Mathematics. Society for Industrial and Applied Mathematics. ISBN 9780898716863. doi:10.1137/1.9780898719000.
  27. Greenwood, J. A. and Williamson, J. B. P., (1966), Contact of nominally flat surfaces, Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, vol. 295, pp. 300--319.
  28. Mikic, B. B., (1974), Thermal contact conductance; theoretical considerations, International Journal of Heat and Mass Transfer, 17(2), pp. 205-214.
  29. Hyun, S., and M.O. Robbins, 2007, Elastic contact between rough surfaces: Effect of roughness at large and small wavelengths. Tribology International, v.40, pp. 1413-1422.
  30. Bradley, RS., 1932, The cohesive force between solid surfaces and the surface energy of solids, Philosophical Magazine Series 7, 13(86), pp. 853--862.
  31. Muller, VM and Derjaguin, BV and Toporov, Y.P., 1983, On two methods of calculation of the force of sticking of an elastic sphere to a rigid plane, Colloids and Surfaces, 7(3), pp. 251-259.
  32. Tabor, D., 1977, Surface forces and surface interactions, Journal of Colloid and Interface Science, 58(1), pp. 2-13.
  33. Muller V M, Yuschenko V S & Derjaguin B V.,1980, "On the influence of molecular forces on the deformation of an elastic sphere and its sticking to a rigid plane", Journal of Colloid and Interface Science, 77 pp. 91-101.
  34. Greenwood J A.,1997, "Adhesion of elastic spheres", Proceedings of the Royal Society, 453 pp. 1277-1297.
  35. Feng J Q.,2000, "Contact behaviour of spherical elastic particles", Colloids and Surfaces A, 172 pp. 175-198.
  36. Johnson, KL and Greenwood, JA, 1997, An adhesion map for the contact of elastic spheres, Journal of Colloid and Interface Science, 192(2), pp. 326-333.
  37. Zheng, Z.J. and Yu, J.L., 2007, Using the Dugdale approximation to match a specific interaction in the adhesive contact of elastic objects, Journal of Colloid and Interface Science, 310(1), pp. 27-34.
  38. Carpick, R.W. and Ogletree, D.F. and Salmeron, M., 1999, A general equation for fitting contact area and friction vs load measurements, Journal of colloid and interface science, 211(2), pp. 395-400.
  • [1]: More about contact stresses and the evolution of bearing stress equations can be found in this publication by NASA Glenn Research Center head the NASA Bearing, Gearing and Transmission Section, Erwin Zaretsky.
  • [2]: A MATLAB routine to solve the linear elastic contact mechanics problem entitled; "An LCP solution of the linear elastic contact mechanics problem" is provided at the file exchange at MATLAB Central.
  • [3]: Contact mechanics calculator.
  • [4]: detailed calculations and formulae of JKR theory for two spheres.
  • [5]: A Matlab code for Hertz contact analysis (includes line, point and elliptical cases).
  • [6]: JKR, MD, and DMT models of adhesion (Matlab routines).

Contact mechanics

Български Механика на контакта ▪ Deutsch Kontaktmechanik ▪ Español Mecánica de contacto ▪ Français Mécanique des contacts ▪ Հայերեն Կոնտակտային լարումներ ▪ Hrvatski Mehanika kontakta ▪ Italiano Meccanica del contatto ▪ 日本語 ヘルツの接触応力 ▪ Português Contato mecânico ▪ Română Mecanica contactului ▪ Русский Механика контактного взаимодействия ▪ Српски / srpski Механика контакта ▪ Svenska Kontaktmekanik ▪ Українська Механіка контактної взаємодії ▪ 中文 接触力学

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No need to say, the goods related with "Contact mechanics" in Alabama can be purchased if you live in Birmingham, Montgomery, Mobile, Huntsville, Tuscaloosa, Hoover, Dothan, Decatur, Auburn, Madison, Florence, Gadsden, Vestavia Hills, Prattville, Phenix City, Alabaster, Bessemer, Enterprise, Opelika, Homewood, Northport, Anniston, Prichard, Athens. And, of course, Daphne, Pelham, Oxford, Albertville, Selma, Mountain Brook, Trussville, Troy, Center Point, Helena, Hueytown, Talladega, Fairhope, Ozark, Alexander City, Cullman, Scottsboro, Millbrook, Foley, Hartselle, Fort Payne, Gardendale, Jasper, Saraland, Muscle Shoals, Eufaula.

No doubt, the goods by request "Contact mechanics" in Alaska can be received in such cities as Anchorage, Fairbanks, Juneau, Sitka, Ketchikan, Wasilla, Kenai, Kodiak, Bethel, Palmer, Homer, Unalaska, Barrow, Soldotna, Valdez, Nome, Kotzebue, Seward, Wrangell, Dillingham, Cordova, North Pole, Houston, Craig, Hooper Bay, Akutan.

Undoubtedly, the products by request "Contact mechanics" in Arizona can be sent to Phoenix, Tucson, Mesa, Chandler, Glendale, Scottsdale, Gilbert, Tempe, Peoria, Surprise, Yuma, Avondale, Flagstaff, Goodyear, Lake Havasu City, Buckeye, Casa Grande, Sierra Vista, Maricopa, Oro Valley, Prescott, Bullhead City, Prescott Valley. And other cities and towns, such as Apache Junction, Marana, El Mirage, Kingman, Queen Creek, Florence, San Luis, Sahuarita, Fountain Hills, Nogales, Douglas, Eloy, Payson, Somerton, Paradise Valley, Coolidge, Cottonwood, Camp Verde, Chino Valley, Show Low, Sedona.

As you know, any things related with "Contact mechanics" in Arkansas can be shipped to Little Rock, Fort Smith, Fayetteville, Springdale, Jonesboro, North Little Rock, Conway, Rogers, Pine Bluff, Bentonville, Hot Springs, Benton, Texarkana, Sherwood, Jacksonville, Russellville, Bella Vista, West Memphis, Paragould, Cabot. It is also available for the people living in Searcy, Van Buren, El Dorado, Maumelle, Blytheville, Forrest City, Siloam Springs, Bryant, Harrison, Hot Springs Village, Mountain Home, Marion, Helena-West Helena, Camden, Magnolia, Arkadelphia, Malvern, Batesville, Hope, etc.

And of course, the goods by your query "Contact mechanics" in California can be delivered to the following cities: Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach, Oakland, Bakersfield, Anaheim, Santa Ana, Riverside, Stockton, Chula Vista, Fremont, Irvine, San Bernardino, Modesto, Oxnard, Fontana, Moreno Valley, Glendale, Huntington Beach, Santa Clarita, Garden Grove. Delivery is also carried out in Santa Rosa, Oceanside, Rancho Cucamonga, Ontario, Lancaster, Elk Grove, Palmdale, Corona, Salinas, Pomona, Torrance, Hayward, Escondido, Sunnyvale, Pasadena, Fullerton, Orange, Thousand Oaks, Visalia, Simi Valley, Concord, Roseville, Santa Clara, Vallejo, Victorville. You can also buy these goods in El Monte, Berkeley, Downey, Costa Mesa, Inglewood, Ventura, West Covina, Norwalk, Carlsbad, Fairfield, Richmond, Murrieta, Burbank, Antioch, Daly City, Temecula, Santa Maria, El Cajon, Rialto, San Mateo, Compton, Clovis, Jurupa Valley, South Gate, Vista, Mission Viejo. Delivery is also carried out in Vacaville, Carson, Hesperia, Redding, Santa Monica, Westminster, Santa Barbara, Chico, Whittier, Newport Beach, San Leandro, Hawthorne, San Marcos, Citrus Heights, Alhambra, Tracy, Livermore, Buena Park, Lakewood, Merced, Hemet, Chino, Menifee, Lake Forest, Napa. The shipping is also available in Redwood City, Bellflower, Indio, Tustin, Baldwin Park, Chino Hills, Mountain View, Alameda, Upland, Folsom, San Ramon, Pleasanton, Lynwood, Union City, Apple Valley, Redlands, Turlock, Perris, Manteca, Milpitas, Redondo Beach, Davis, Camarillo, Yuba City. And also in Rancho Cordova, Palo Alto, Yorba Linda, Walnut Creek, South San Francisco, San Clemente, Pittsburg, Laguna Niguel, Pico Rivera, Montebello, Lodi, Madera, Monterey Park, La Habra, Santa Cruz, Encinitas, Tulare, Gardena, National City, Cupertino. It is also available for the people living in Huntington Park, Petaluma, San Rafael, La Mesa, Rocklin, Arcadia, Diamond Bar, Woodland, Fountain Valley, Porterville, Paramount, Hanford, Rosemead, Eastvale, Santee, Highland, Delano, Colton, Novato, Lake Elsinore, Brentwood, Yucaipa, Cathedral City, Watsonville, Placentia...

Usually, the goods related with "Contact mechanics" in Colorado can be purchased if you live in Denver, Colorado Springs, Aurora, Fort Collins, Lakewood, Thornton, Arvada, Westminster, Pueblo, Centennial, Boulder, Greeley, Longmont, Loveland, Broomfield, Grand Junction, Castle Rock, Commerce City, Parker, Littleton, Northglenn, Brighton, Englewood. And, of course, Wheat Ridge, Fountain, Lafayette, Windsor, Erie, Evans, Golden, Louisville, Montrose, Durango, Cañon City, Greenwood Village, Sterling, Lone Tree, Johnstown, Superior, Fruita, Steamboat Springs, Federal Heights, Firestone, Fort Morgan, Frederick, Castle Pines, and other cities.

And of course, the products related to the term "Contact mechanics" in Connecticut can be purchased if you live in Bridgeport, New Haven, Hartford, Stamford, Waterbury, Norwalk, Danbury, New Britain, Bristol, Meriden, Milford, West Haven, Middletown, Norwich, Shelton, Torrington, New London, Ansonia, Derby, Groton...

It goes without saying that any things related with "Contact mechanics" in Delaware can be shipped to such cities as Wilmington, Dover, Newark, Middletown, Smyrna, Milford, Seaford, Georgetown, Elsmere, New Castle, Millsboro, Laurel, Harrington, Camden, Clayton, Lewes, Milton, Selbyville, Bridgeville, Townsend, and other cities.

As you know, the products by request "Contact mechanics" in Florida can be received in Jacksonville, Miami, Tampa, Orlando, St. Petersburg, Hialeah, Tallahassee, Fort Lauderdale, Port St. Lucie, Cape Coral, Pembroke Pines, Hollywood, Miramar, Gainesville, Coral Springs, Miami Gardens, Clearwater, Palm Bay, Pompano Beach, West Palm Beach, Lakeland, Davie, Miami Beach, Boca Raton. And, of course, Deltona, Plantation, Sunrise, Palm Coast, Largo, Deerfield Beach, Melbourne, Boynton Beach, Lauderhill, Fort Myers, Weston, Kissimmee, Homestead, Delray Beach, Tamarac, Daytona Beach, Wellington, North Miami, Jupiter, North Port, Coconut Creek, Port Orange, Sanford, Margate, Ocala, Sarasota, Pensacola.

Naturally, the products related to the term "Contact mechanics" in Georgia can be received in Atlanta, Columbus, Augusta, Macon, Savannah, Athens, Sandy Springs, Roswell, Johns Creek, Albany, Warner Robins, Alpharetta, Marietta, Valdosta, Smyrna, Dunwoody, Rome, East Point, Milton, Gainesville, Hinesville, Peachtree City, Newnan, Dalton, Douglasville, Kennesaw, LaGrange, Statesboro, Lawrenceville, Duluth, Stockbridge, Woodstock, Carrollton, Canton, Griffin, McDonough, Acworth, Pooler, Union City, etc.

And of course, the goods related with "Contact mechanics" in Hawaii can be received in Honolulu, East Honolulu, Pearl City, Hilo, Kailua, Waipahu, Kaneohe, Mililani Town, Kahului, Ewa Gentry, Mililani Mauka, Kihei, Makakilo, Wahiawa, Schofield Barracks, Wailuku, Kapolei, Ewa Beach, Royal Kunia, Halawa, Waimalu, Waianae, Nanakuli, Kailua, Lahaina, Waipio, Hawaiian Paradise Park, Kapaa, etc.

As you know, any products related with "Contact mechanics" in Idaho can be received in such cities as Boise, Meridian, Nampa, Idaho Falls, Pocatello, Caldwell, Coeur d'Alene, Twin Falls, Lewiston, Post Falls, Rexburg, Moscow, Eagle, Kuna, Ammon, Chubbuck, Hayden, Mountain Home, Blackfoot, Garden City, Jerome, Burley, and other cities.

Today the goods related with "Contact mechanics" in Illinois can be shipped to Chicago, Aurora, Rockford, Joliet, Naperville, Springfield, Peoria, Elgin, Waukegan, Champaign, Bloomington, Decatur, Evanston, Des Plaines, Berwyn, Wheaton, Belleville, Elmhurst, DeKalb, Moline, Urbana, Crystal Lake, Quincy, Rock Island, Park Ridge, Calumet City, Pekin, Danville, St. Charles, North Chicago, Galesburg, Chicago Heights, Granite City, Highland Park, Burbank, O'Fallon, Oak Forest, Alton, Kankakee, West Chicago, East St. Louis, McHenry, Batavia, Carbondale, Freeport, Belvidere, Collinsville, Harvey, Lockport, Woodstock, and other cities and towns.

Of course, any things related with "Contact mechanics" in Indiana can be received in such cities as Indianapolis, Fort Wayne, Evansville, South Bend, Carmel, Fishers, Bloomington, Hammond, Gary, Lafayette, Muncie, Terre Haute, Kokomo, Noblesville, Anderson, Greenwood, Elkhart, Mishawaka, Lawrence, Jeffersonville, Columbus, Portage, New Albany, Richmond, Westfield, Valparaiso, Goshen, Michigan City, West Lafayette, Marion, East Chicago, Hobart, Crown Point, Franklin, La Porte, Greenfield, and other cities and towns.

No need to say, the goods named "Contact mechanics" in Iowa can be shipped to such cities as Des Moines, Cedar Rapids, Davenport, Sioux City, Iowa City, Waterloo, Council Bluffs, Ames, West Des Moines, Dubuque, Ankeny, Urbandale, Cedar Falls, Marion, Bettendorf, Marshalltown, Mason City, Clinton, Burlington, Ottumwa, Fort Dodge, Muscatine, Coralville, Johnston, North Liberty, Altoona, Newton, Indianola, etc.

And of course, the goods by request "Contact mechanics" in Kansas can be purchased if you live in Wichita, Overland Park, Kansas City, Olathe, Topeka, Lawrence, Shawnee, Manhattan, Lenexa, Salina, Hutchinson, Leavenworth, Leawood, Dodge City, Garden City, Junction City, Emporia, Derby, Prairie Village, Hays, Liberal, Gardner, Pittsburg, Newton, Great Bend, McPherson, El Dorado, Ottawa, Winfield, Arkansas City, Andover, Lansing, Merriam, Haysville, Atchison, Parsons and smaller towns.

It goes without saying that the products by request "Contact mechanics" in Kentucky can be delivered to the following cities: Louisville, Lexington, Bowling Green, Owensboro, Covington, Hopkinsville, Richmond, Florence, Georgetown, Henderson, Elizabethtown, Nicholasville, Jeffersontown, Frankfort, Paducah, Independence, Radcliff, Ashland, Madisonville, Winchester, Erlanger, Murray, St. Matthews, Fort Thomas, Danville, Newport, Shively, Shelbyville, Glasgow, Berea, Bardstown, Shepherdsville, Somerset, Lyndon, Lawrenceburg, Middlesboro, Mayfield and smaller towns.

No doubt, the goods related with "Contact mechanics" in Louisiana can be delivered to the following cities: New Orleans, Baton Rouge, Shreveport, Metairie, Lafayette, Lake Charles, Kenner, Bossier City, Monroe, Alexandria, Houma, Marrero, New Iberia, Laplace, Slidell, Prairieville, Central, Terrytown, Ruston, Sulphur, Harvey, Hammond, Bayou Cane, Shenandoah, Natchitoches, Gretna, Chalmette, Opelousas, Estelle, Zachary and smaller towns.

And today any things related with "Contact mechanics" in Maine can be shipped to Portland, Lewiston, Bangor, South Portland, Auburn, Biddeford, Sanford, Saco, Augusta, Westbrook, Waterville, Presque Isle, Brewer, Bath, Caribou, Ellsworth, Old Town, Rockland, Belfast, Gardiner, Calais, Hallowell, Eastport and smaller towns.

As always, the found goods by query "Contact mechanics" in Maryland can be shipped to such cities as Baltimore, Frederick, Rockville, Gaithersburg, Bowie, Hagerstown, Annapolis, College Park, Salisbury, Laurel, Greenbelt, Cumberland, Westminster, Hyattsville, Takoma Park, Easton, Elkton, Aberdeen, Havre de Grace, Cambridge, New Carrollton, Bel Air, and other cities.

As always, the products by request "Contact mechanics" in Massachusetts can be received in Boston, Worcester, Springfield, Lowell, Cambridge, New Bedford, Brockton, Quincy, Lynn, Fall River, Newton, Lawrence, Somerville, Framingham, Haverhill, Waltham, Malden, Brookline, Plymouth, Medford, Taunton, Chicopee, Weymouth, Revere, Peabody, Methuen, Barnstable, Pittsfield, Attleboro, Arlington, Everett, Salem, Westfield, Leominster, Fitchburg, Billerica, Holyoke, Beverly, Marlborough, Woburn, Amherst, Braintree, Shrewsbury, Chelsea, Dartmouth, Chelmsford, Andover, Natick, Randolph, Watertown and smaller towns.

Normally, the products by request "Contact mechanics" in Michigan can be delivered to the following cities: Detroit, Grand Rapids, Warren, Sterling Heights, Lansing, Ann Arbor, Flint, Dearborn, Livonia, Clinton, Canton, Westland, Troy, Farmington Hills, Macomb Township, Kalamazoo, Shelby, Wyoming, Southfield, Waterford, Rochester Hills, West Bloomfield, Taylor, Saint Clair Shores, Pontiac, Dearborn Heights, Royal Oak, Novi, Ypsilanti, Battle Creek, Saginaw, Kentwood, East Lansing, Redford, Roseville, Georgetown, Portage, Chesterfield Township, Midland, Bloomfield Charter Township, Oakland County, Saginaw, Commerce, Meridian, Muskegon, Lincoln Park, Grand Blanc, Holland, Orion, Bay City, Independence Charter Township, and other cities and towns.

As usual, any things related with "Contact mechanics" in Minnesota can be delivered to the following cities: Minneapolis, Saint Paul, Rochester, Bloomington, Duluth, Brooklyn Park, Plymouth, Maple Grove, Woodbury, St. Cloud, Eagan, Eden Prairie, Coon Rapids, Blaine, Burnsville, Lakeville, Minnetonka, Apple Valley, Edina, St. Louis Park, Moorhead, Mankato, Maplewood, Shakopee, Richfield, Cottage Grove, Roseville, Inver Grove Heights, Andover, Brooklyn Center, Savage, Oakdale, Fridley, Winona, Shoreview, Ramsey, Owatonna, Chanhassen, Prior Lake, White Bear Lake, Chaska, Austin, Elk River, Champlin, Faribault, Rosemount, Crystal, Farmington, Hastings, New Brighton.

Undoubtedly, the found goods by query "Contact mechanics" in Mississippi can be bought in Jackson, Gulfport, Southaven, Hattiesburg, Biloxi, Meridian, Tupelo, Greenville, Olive Branch, Horn Lake, Clinton, Pearl, Ridgeland, Starkville, Columbus, Vicksburg, Pascagoula, Clarksdale, Oxford, Laurel, Gautier, Ocean Springs, Madison, Brandon, Greenwood, Cleveland, Natchez, Long Beach, Corinth, Hernando, Moss Point, McComb, Canton, Carriere, Grenada, Brookhaven, Indianola, Yazoo City, West Point, Picayune, Petal, etc.

Undoubtedly, the found goods by query "Contact mechanics" in Missouri can be delivered to the following cities: Kansas City, St. Louis, Springfield, Independence, Columbia, Lee’s Summit, O’Fallon, St. Joseph, St. Charles, Blue Springs, St. Peters, Florissant, Joplin, Chesterfield, Jefferson City, Cape Girardeau, Oakville, Wildwood, University City, Ballwin, Raytown, Liberty, Wentzville, Mehlville, Kirkwood, Maryland Heights, Hazelwood, Gladstone, Grandview, Belton, Webster Groves, Sedalia, Ferguson, Arnold, Affton.

Naturally, the goods named "Contact mechanics" in Montana can be received in such cities as Billings, Missoula, Great Falls, Bozeman, Butte, Helena, Kalispell, Havre, Anaconda, Miles City, Belgrade, Livingston, Laurel, Whitefish, Lewistown, Sidney, and other cities.

No need to say, the found goods by query "Contact mechanics" in Nebraska can be received in such cities as Omaha, Lincoln, Bellevue, Grand Island, Kearney, Fremont, Hastings, Norfolk, North Platte, Papillion, Columbus, La Vista, Scottsbluff, South Sioux City, Beatrice, Lexington, and so on.

As usual, the goods by your query "Contact mechanics" in Nevada can be shipped to such cities as Las Vegas, Henderson, Reno, North Las Vegas, Sparks, Carson City, Fernley, Elko, Mesquite, Boulder City, Fallon, Winnemucca, West Wendover, Ely, Yerington, Carlin, Lovelock, Wells, Caliente, etc.

No need to say, the products by request "Contact mechanics" in New Hampshire can be received in Manchester, Nashua, Concord, Derry, Dover, Rochester, Salem, Merrimack, Hudson, Londonderry, Keene, Bedford, Portsmouth, Goffstown, Laconia, Hampton, Milford, Durham, Exeter, Windham, Hooksett, Claremont, Lebanon, Pelham, Somersworth, Hanover, Amherst, Raymond, Conway, Berlin...

And of course, any products related with "Contact mechanics" in New Jersey can be shipped to such cities as Newark, Jersey City, Paterson, Elizabeth, Edison, Woodbridge, Lakewood, Toms River, Hamilton, Trenton, Clifton, Camden, Brick, Cherry Hill, Passaic, Middletown, Union City, Old Bridge, Gloucester Township, East Orange, Bayonne, Franklin, North Bergen, Vineland, Union, Piscataway, New Brunswick, Jackson, Wayne, Irvington, Parsippany-Troy Hills, Howell, Perth Amboy, Hoboken, Plainfield, West New York, Washington Township, East Brunswick, Bloomfield, West Orange, Evesham, Bridgewater, South Brunswick, Egg Harbor, Manchester, Hackensack, Sayreville, Mount Laurel, Berkeley, North Brunswick.

No need to say, the goods named "Contact mechanics" in New Mexico can be shipped to such cities as Albuquerque, Las Cruces, Rio Rancho, Santa Fe, Roswell, Farmington, South Valley, Clovis, Hobbs, Alamogordo, Carlsbad, Gallup, Deming, Los Lunas, Chaparral, Sunland Park, Las Vegas, Portales, Los Alamos, North Valley, Artesia, Lovington, Silver City, Española.

And of course, any products related with "Contact mechanics" in New York can be delivered to New York, Buffalo, Rochester, Yonkers, Syracuse, Albany, New Rochelle, Mount Vernon, Schenectady, Utica, White Plains, Troy, Niagara Falls, Binghamton, Rome, Long Beach, Poughkeepsie, North Tonawanda, Jamestown, Ithaca, Elmira, Newburgh, Middletown, Auburn, Watertown, Glen Cove, Saratoga Springs, Kingston, Peekskill, Lockport, Plattsburgh, Cortland, Amsterdam, Oswego, Lackawanna, Cohoes, Rye, Gloversville, Beacon, Batavia, Tonawanda, Glens Falls, Olean, Oneonta, Geneva, Dunkirk, Fulton, Oneida, Corning, Ogdensburg, Canandaigua, Watervliet...

As always, the goods related with "Contact mechanics" in North Carolina can be shipped to such cities as Charlotte, Raleigh, Greensboro, Durham, Winston-Salem, Fayetteville, Cary, Wilmington, High Point, Greenville, Asheville, Concord, Gastonia, Jacksonville, Chapel Hill, Rocky Mount, Huntersville, Burlington, Wilson, Kannapolis, Apex, Hickory, Wake Forest, Indian Trail, Mooresville, Goldsboro, Monroe, Salisbury, Holly Springs, Matthews, New Bern, Sanford, Cornelius, Garner, Thomasville, Statesville, Asheboro, Mint Hill, Fuquay-Varina, Morrisville, Kernersville, Lumberton, Kinston, Carrboro, Havelock, Shelby, Clemmons, Lexington, Clayton, Boone, and so on.

And today any things related with "Contact mechanics" in North Dakota can be received in such cities as Fargo, Bismarck, Grand Forks, Minot, West Fargo, Williston, Dickinson, Mandan, Jamestown, Wahpeton, Devils Lake, Watford City, Valley City, Grafton, Lincoln, Beulah, Rugby, Stanley, Horace, Casselton, New Town, Hazen, Bottineau, Lisbon, Carrington.

And today any things related with "Contact mechanics" in Ohio can be purchased if you live in Columbus, Cleveland, Cincinnati, Toledo, Akron, Dayton, Parma, Canton, Youngstown, Lorain, Hamilton, Springfield, Kettering, Elyria, Lakewood, Cuyahoga Falls, Euclid, Middletown, Mansfield, Newark, Mentor, Cleveland Heights, Beavercreek, Strongsville, Fairfield, Dublin, Warren, Findlay, Lancaster, Lima, Huber Heights, Marion, Westerville, Reynoldsburg, Grove City, Stow, Delaware, Brunswick, Upper Arlington, Gahanna, Westlake, North Olmsted, Fairborn, Massillon, Mason, North Royalton, Bowling Green, North Ridgeville, Kent, Garfield Heights, etc.

Of course, any products related with "Contact mechanics" in Oklahoma can be bought in Oklahoma City, Tulsa, Norman, Broken Arrow, Lawton, Edmond, Moore, Midwest City, Enid, Stillwater, Muskogee, Bartlesville, Owasso, Shawnee, Yukon, Ardmore, Ponca City, Bixby, Duncan, Del City, Jenks, Sapulpa, Mustang, Sand Springs, Bethany, Altus, Claremore, El Reno, McAlester, Ada, Durant, Tahlequah, Chickasha, Miami, Glenpool, Elk City, Woodward, Okmulgee, Choctaw, Weatherford, Guymon, Guthrie, Warr Acres.

Today the goods by your query "Contact mechanics" in Oregon can be purchased if you live in Portland, Salem, Eugene, Gresham, Hillsboro, Beaverton, Bend, Medford, Springfield, Corvallis, Albany, Tigard, Lake Oswego, Keizer, Grants Pass, Oregon City, McMinnville, Redmond, Tualatin, West Linn, Woodburn, Forest Grove, Newberg, Wilsonville, Roseburg, Klamath Falls, Ashland, Milwaukie, Sherwood, Happy Valley, Central Point, Canby, Hermiston, Pendleton, Troutdale, Lebanon, Coos Bay, The Dalles, Dallas, St. Helens, La Grande, Cornelius, Gladstone, Ontario, Sandy, Newport, Monmouth.

Normally, the goods by request "Contact mechanics" in Pennsylvania can be received in such cities as Philadelphia, Pittsburgh, Allentown, Erie, Reading, Scranton, Bethlehem, Lancaster, Harrisburg, Altoona, York, Wilkes-Barre, Chester, Williamsport, Easton, Lebanon, Hazleton, New Castle, Johnstown, McKeesport, Hermitage, Greensburg, Pottsville, Sharon, Butler, Washington, Meadville, New Kensington, Coatesville, St. Marys, Lower Burrell, Oil City, Nanticoke, Uniontown and smaller towns.

Undoubtedly, the products by request "Contact mechanics" in Rhode Island can be shipped to Providence, Warwick, Cranston, Pawtucket, East Providence, Woonsocket, Coventry, Cumberland, North Providence, South Kingstown, West Warwick, Johnston, North Kingstown, Newport, Bristol, Westerly, Smithfield, Lincoln, Central Falls, Portsmouth, Barrington, Middletown, Burrillville, Narragansett, Tiverton, East Greenwich, North Smithfield, Warren, Scituate, and other cities.

As usual, the goods named "Contact mechanics" in South Carolina can be delivered to Columbia, Charleston, North Charleston, Mount Pleasant, Rock Hill, Greenville, Summerville, Sumter, Hilton Head Island, Spartanburg, Florence, Goose Creek, Aiken, Myrtle Beach, Anderson, Greer, Mauldin, Greenwood, North Augusta, Easley, Simpsonville, Hanahan, Lexington, Conway, West Columbia, North Myrtle Beach, Clemson, Orangeburg, Cayce, Bluffton, Beaufort, Gaffney, Irmo, Fort Mill, Port Royal, Forest Acres, Newberry.

As always, the goods by request "Contact mechanics" in South Dakota can be purchased if you live in Sioux Falls, Rapid City, Aberdeen, Brookings, Watertown, Mitchell, Yankton, Pierre, Huron, Spearfish, Vermillion.

It goes without saying that any products related with "Contact mechanics" in Tennessee can be received in such cities as Memphis, Nashville, Knoxville, Chattanooga, Clarksville, Murfreesboro, Franklin, Jackson, Johnson City, Bartlett, Hendersonville, Kingsport, Collierville, Smyrna, Cleveland, Brentwood, Germantown, Columbia, Spring Hill, La Vergne, Gallatin, Cookeville, Mount Juliet, Lebanon, Morristown, Oak Ridge, Maryville, Bristol, Farragut, Shelbyville, East Ridge, Tullahoma.

And the products related to the term "Contact mechanics" in Texas can be delivered to Houston, San Antonio, Dallas, Austin, Fort Worth, El Paso, Arlington, Corpus Christi, Plano, Laredo, Lubbock, Garland, Irving, Amarillo, Grand Prairie, Brownsville, McKinney, Frisco, Pasadena, Mesquite, Killeen, McAllen, Carrollton, Midland, Waco, Denton, Abilene, Odessa, Beaumont, Round Rock, The Woodlands, Richardson, Pearland, College Station, Wichita Falls, Lewisville, Tyler, San Angelo, League City, Allen, Sugar Land, Edinburg, Mission, Longview, Bryan, Pharr, Baytown, Missouri City, Temple, Flower Mound, New Braunfels, North Richland Hills, Conroe, Victoria, Cedar Park, Harlingen, Atascocita, Mansfield, Georgetown, San Marcos, Rowlett, Pflugerville, Port Arthur, Spring, Euless, DeSoto, Grapevine, Galveston...

Today any things related with "Contact mechanics" in Utah can be sent to Salt Lake City, West Valley City, Provo, West Jordan, Orem, Sandy, Ogden, St. George, Layton, Taylorsville, South Jordan, Logan, Lehi, Murray, Bountiful, Draper, Riverton, Roy, Spanish Fork, Pleasant Grove, Cottonwood Heights, Tooele, Springville, Cedar City, Midvale. The shipping is also available in Kaysville, Holladay, American Fork, Clearfield, Syracuse, South Salt Lake, Herriman, Eagle Mountain, Clinton, Washington, Payson, Farmington, Brigham City, Saratoga Springs, North Ogden, South Ogden, North Salt Lake, Highland, Centerville, Hurricane, Heber City, West Haven, Lindon.

Usually, the goods related with "Contact mechanics" in Vermont can be bought in Burlington, South Burlington, Rutland, Barre, Montpelier, Winooski, St. Albans, Newport, Vergennes, and other cities and towns.

As always, the goods named "Contact mechanics" in Virginia can be delivered to the following cities: Virginia Beach, Norfolk, Chesapeake, Richmond, Newport News, Alexandria, Hampton, Roanoke, Portsmouth, Suffolk, Lynchburg, Harrisonburg, Charlottesville, Danville, Manassas, Petersburg, Fredericksburg, Winchester, Salem, Staunton, Fairfax, Hopewell, Waynesboro, Colonial Heights, Radford, Bristol, Manassas Park, Williamsburg, Falls Church, Martinsville, Poquoson, and so on.

As always, the goods by request "Contact mechanics" in Washington can be received in such cities as Seattle, Spokane, Tacoma, Vancouver, Bellevue, Kent, Everett, Renton, Federal Way, Yakima, Spokane Valley, Kirkland, Bellingham, Kennewick, Auburn, Pasco, Marysville, Lakewood, Redmond, Shoreline, Richland, Sammamish, Burien, Olympia, Lacey. It's also available for those who live in Edmonds, Puyallup, Bremerton, Lynnwood, Bothell, Longview, Issaquah, Wenatchee, Mount Vernon, University Place, Walla Walla, Pullman, Des Moines, Lake Stevens, SeaTac, Maple Valley, Mercer Island, Bainbridge Island, Oak Harbor, Kenmore, Moses Lake, Camas, Mukilteo, Mountlake Terrace, Tukwila and smaller towns.

Of course, any things related with "Contact mechanics" in West Virginia can be received in such cities as Charleston, Huntington, Morgantown, Parkersburg, Wheeling, Weirton, Fairmont, Martinsburg, Beckley, Clarksburg, South Charleston, St. Albans, Vienna, Bluefield and smaller towns.

And today the goods by request "Contact mechanics" in Wisconsin can be received in such cities as Milwaukee, Madison, Green Bay, Kenosha, Racine, Appleton, Waukesha, Oshkosh, Eau Claire, Janesville, West Allis, La Crosse, Sheboygan, Wauwatosa, Fond du Lac, New Berlin, Wausau. It's also available for those who live in Brookfield, Beloit, Greenfield, Franklin, Oak Creek, Manitowoc, West Bend, Sun Prairie, Superior, Stevens Point, Neenah, Fitchburg, Muskego, Watertown, De Pere, Mequon, South Milwaukee, Marshfield.

No doubt, any things related with "Contact mechanics" in Wyoming can be delivered to the following cities: Cheyenne, Casper, Laramie, Gillette, Rock Springs, Sheridan, Green River, Evanston, Riverton, Jackson, Cody, Rawlins, Lander, Torrington, Powell, Douglas, Worland.

Canada Delivery, Shipping to Canada

Usually, the goods by your query "Contact mechanics" in Canada can be received in such cities as Toronto, Montreal, Calgary, Ottawa, Edmonton, Mississauga, Winnipeg, Vancouver, Brampton, Hamilton, Quebec City, Surrey, Laval, Halifax, London, Markham, Vaughan, Gatineau, Longueuil, Burnaby, Saskatoon, Kitchener, Windsor, Regina, Richmond, Richmond Hill.

You can also buy these goods in Oakville, Burlington, Greater Sudbury, Sherbrooke, Oshawa, Saguenay, Lévis, Barrie, Abbotsford, St. Catharines, Trois-Rivières, Cambridge, Coquitlam, Kingston, Whitby, Guelph, Kelowna, Saanich, Ajax, Thunder Bay, Terrebonne, St. John's, Langley, Chatham-Kent, Delta.

And also in Waterloo, Cape Breton, Brantford, Strathcona County, Saint-Jean-sur-Richelieu, Red Deer, Pickering, Kamloops, Clarington, North Vancouver, Milton, Nanaimo, Lethbridge, Niagara Falls, Repentigny, Victoria, Newmarket, Brossard, Peterborough, Chilliwack, Maple Ridge, Sault Ste. Marie, Kawartha Lakes, Sarnia, Prince George.

And other cities and towns, such as Drummondville, Saint John, Moncton, Saint-Jérôme, New Westminster, Wood Buffalo, Granby, Norfolk County, St. Albert, Medicine Hat, Caledon, Halton Hills, Port Coquitlam, Fredericton, Grande Prairie, North Bay, Blainville, Saint-Hyacinthe, Aurora, Welland, Shawinigan, Dollard-des-Ormeaux, Belleville, North Vancouver, and other cities.

Actually, the found goods by query "Contact mechanics" can be shipped to any place in Canada, including Ontario, Quebec, British Columbia, Alberta, Manitoba, Saskatchewan, Nova Scotia, New Brunswick, Newfoundland and Labrador, and Prince Edward Island.

UK Delivery, Shipping to the United Kingdom

It goes without saying that the goods related with "Contact mechanics" in the United Kingdom can be shipped to London, Birmingham, Leeds, Glasgow, Sheffield, Bradford, Edinburgh, Liverpool, Manchester, Bristol, Wakefield, Cardiff, Coventry, Nottingham, Leicester, Sunderland, Belfast, Newcastle upon Tyne, Brighton, Hull, Plymouth, Stoke-on-Trent.

The delivery is also available in Wolverhampton, Derby, Swansea, Southampton, Salford, Aberdeen, Westminster, Portsmouth, York, Peterborough, Dundee, Lancaster, Oxford, Newport, Preston, St Albans, Norwich, Chester, Cambridge, Salisbury, Exeter, Gloucester. It is also available for the people living in Lisburn, Chichester, Winchester, Londonderry, Carlisle, Worcester, Bath, Durham, Lincoln, Hereford, Armagh, Inverness, Stirling, Canterbury, Lichfield, Newry, Ripon, Bangor, Truro, Ely, Wells, St. Davids and smaller towns.

Generally, the goods by request "Contact mechanics" can be shipped to any place in the UK, including England, Scotland, Wales, and Northern Ireland.

Ireland Delivery, Shipping to Ireland

And the found goods by query "Contact mechanics" in Ireland can be delivered to Dublin, Cork, Limerick, Galway, Waterford, Drogheda, Dundalk, Swords, Bray, Navan, Ennis, Kilkenny, Tralee, Carlow, Newbridge, Naas, Athlone, Portlaoise, Mullingar, Wexford, Balbriggan, Letterkenny, Celbridge, Sligo. And also in Clonmel, Greystones, Malahide, Leixlip, Carrigaline, Tullamore, Killarney, Arklow, Maynooth, Cobh, Castlebar, Midleton, Mallow, Ashbourne, Ballina, Laytown-Bettystown-Mornington, Enniscorthy, Wicklow, Tramore, Cavan...

Generally, the goods related with "Contact mechanics" can be shipped to any place in Ireland, including Leinster, Ulster, Munster, and Connacht.

Australia Delivery, Shipping to Australia

It goes without saying that the goods by request "Contact mechanics" in Australia can be delivered to Sydney, Melbourne, Brisbane, Perth, Adelaide, Gold Coast, Tweed Heads, Newcastle, Maitland, Canberra, Queanbeyan, Sunshine Coast, Wollongong, Hobart, Geelong, Townsville, Cairns, Darwin, Toowoomba, Ballarat, Bendigo, Albury, Wodonga, Launceston, Mackay.

The shipping is also available in Rockhampton, Bunbury, Bundaberg, Coffs Harbour, Wagga Wagga, Hervey Bay, Mildura, Wentworth, Shepparton, Mooroopna, Gladstone, Tannum Sands, Port Macquarie, Tamworth, Traralgon, Morwell, Orange, Geraldton, Bowral, Mittagong, Dubbo, Busselton, Bathurst, Nowra, Bomaderry, Warrnambool, Albany, Warragul, Drouin, Kalgoorlie, Boulder, Devonport, and other cities.

Actually, the found goods by query "Contact mechanics" can be shipped to any place in Australia, including New South Wales, Victoria, Queensland, Western Australia, South Australia, Tasmania, Australian Capital Territory, and Northern Territory.

New Zealand Delivery, Shipping to New Zealand

Of course, any things related with "Contact mechanics" in New Zealand can be delivered to the following cities: Auckland, Wellington, Christchurch, Hamilton, Tauranga, Napier-Hastings, Dunedin, Lower Hutt, Palmerston North, Nelson, Rotorua, New Plymouth, Whangarei, Invercargill, Whanganui, Gisborne, Porirua, Invercargill, Nelson, Upper Hutt, Gisborne, Blenheim, Pukekohe, Timaru, Taupo, and other cities and towns.

In fact, the found goods by query "Contact mechanics" can be shipped to any place in New Zealand, including North Island, South Island, Waiheke Island, and smaller islands. And of course,the goods related withcan be received inAs well as in.

Actually,

Delivery

Abkhazia: Gagra, Gudauta, Lake Ritsa, New Athos, Ochamchire, Pitsunda, Sukhumi, Tsandryphsh, etc.

Afghanistan: Herat, Jalalabad, Kabul, Kandahar, Kunduz, Mazar-i-Sharif, Taloqan, etc.

Albania: Berat, Butrint, Dhërmi, Durrës, Gjirokastër, Himarë, Korçë, Pogradec, Qeparo, Sarandë, Shkodër, Tirana, Velipojë, Vlorë, etc.

Algeria: Algiers, Oran, etc.

American Virgin Islands: Charlotte Amalie, etc.

Andorra: Andorra la Vella, Arinsal, El Pas de la Casa, Encamp, Grandvalira, Ordino, Pal, Soldeu, Vallnord, etc.

Angola: Benguela, Luanda, etc.

Anguilla: The Valley, West End, etc.

Antigua and Barbuda: Saint John’s, etc.

Argentina: Buenos Aires, Colón, Córdoba, El Calafate, La Plata, Los Glaciares, Mar del Plata, Mendoza, Pinamar, Puerto Iguazú, Puerto Madryn, Rosario, Salta, San Carlos de Bariloche, San Martín de los Andes, San Miguel de Tucumán, San Rafael, Tandil, Tierra del Fuego, Ushuaia, Villa Carlos Paz, Villa Gesell, Villa La Angostura, Villa de Merlo, etc.

Armenia: Dilijan, Etchmiadzin, Goris, Gyumri, Jermuk, Sevan, Stepanavan, Tsaghkadzor, Vagharshapat, Vanadzor, Yeghegnadzor, Yerevan, etc.

Aruba: Oranjestad, etc.

Australia: Adelaide, Brisbane, Byron Bay, Cairns, Canberra, Darwin, Gold Coast, Great Barrier Reef, Hobart, Melbourne, Perth, Sydney, Tasmania, etc.

Austria: Abtenau, Alpbach, Austrian Alps, Bad Gastein, Bad Hofgastein, Bad Kleinkirchheim, Dürnstein, Flachau, Fugen, Graz, Innsbruck, Ischgl, Kaprun, Kitzbühel, Klagenfurt, Kufstein, Lech, Leogang, Lienz, Linz, Maria Alm, Mayrhofen, Neustift im Stubaital, Obergurgl, Saalbach-Hinterglemm, Saalfelden, Salzburg, Schladming, Seefeld, Serfaus, St. Anton, St. Johann im Pongau, Sölden, Tux, Tyrol, Vienna, Villach, Wachau, Wagrain, Zell am See, etc.

Azerbaijan: Baku, Ganja, Lankaran, Quba, Qusar, Shahdag, Sheki, Stepanakert, etc.

Bahamas: Andros, Eleuthera, Exuma, Freeport, Grand Bahama, Nassau, New Providence, Paradise Island, etc.

Bahrain: Manama, etc.

Bangladesh: Chittagong, Cox's Bazar, Dhaka, Khulna, Narayanganj, Rajshahi, Sylhet, etc.

Barbados: Bridgetown, etc.

Belarus: Babruysk, Białowieża Forest, Brest Belarus, Gomel, Grodno, Lahoysk, Maladzyechna, Minsk, Mogilev, Nesvizh, Pinsk, Silichi, Vitebsk, etc.

Belgium: Antwerp, Ardennes, Blankenberge, Bouillon, Bruges, Brussels, Charleroi, De Haan, De Panne, Durbuy, Flanders, Ghent, Hasselt, Kortrijk, Leuven, Liège, Namur, Nieuwpoort, Ostend, Spa, Ypres, Zeebrugge, etc.

Belize: Ambergris Caye, Belize City, Caye Caulker, Placencia, San Pedro, etc.

Benin: Cotonou, etc.

Bermuda: Hamilton, etc.

Bhutan: Paro, Thimphu, etc.

Bolivia: Cochabamba, El Alto, La Paz, Oruro, Quillacollo, Santa Cruz de la Sierra, Sucre, Uyuni, etc.

Bosnia and Herzegovina: Banja Luka, Bihać, Jahorina, Medjugorje, Mostar, Neum, Sarajevo, Travnik, Trebinje, etc.

Botswana: Gaborone, Maun, etc.

Brazil: Amazon River, Amazonia, Angra dos Reis, Arraial do Cabo, Atlantic Forest, Balneário Camboriú, Belo Horizonte, Belém, Bombinhas, Brasília, Búzios, Cabo Frio, Camaçari, Campinas, Campos do Jordão, Caraguatatuba, Copacabana, Costa do Sauípe, Curitiba, Duque de Caxias, Fernando de Noronha, Florianópolis, Fortaleza, Foz do Iguaçu, Goiânia, Gramado, Guarujá, Guarulhos, Iguazu Falls, Ilha Grande, Ilhabela, Ilhéus, Ipanema, Itacaré, Maceió, Manaus, Morro de São Paulo, Natal, Niterói, Osasco, Ouro Preto, Paraty, Petrópolis, Porto Alegre, Porto Seguro, Praia do Forte, Recife, Ribeirão Preto, Rio de Janeiro, Salvador, Santos, São Gonçalo, São José dos Campos, São Luís, São Paulo, São Sebastião, Trancoso, Ubatuba, Vila do Abraão, etc.

British Virgin Islands: Tortola, etc.

Brunei: Bandar Seri Begawan, etc.

Bulgaria: Albena, Balchik, Bansko, Blagoevgrad, Borovets, Burgas, Chernomorets, Dobrinishte, Golden Sands, Kiten, Koprivshtitsa, Lozenets, Nesebar, Obzor, Pamporovo, Pirin, Pleven, Plovdiv, Pomorie, Primorsko, Ravda, Razlog, Rila, Ruse, Samokov, Sandanski, Shumen, Sofia, Sozopol, Stara Zagora, Sunny Beach, Sveti Vlas, Tsarevo, Varna, Veliko Tarnovo, etc.

Burkina Faso: Bobo-Dioulasso, Ouagadougou, etc.

Burundi: Bujumbura, etc.

Cambodia: Angkor, Battambang, Kampot, Kep, Phnom Penh, Siem Reap, Sihanoukville, etc.

Cameroon: Bafoussam, Bamenda, Douala, Garoua, Kribi, Limbe, Maroua, Yaoundé, etc.

Canada: Alberta, Banff, Brampton, British Columbia, Burnaby, Calgary, Charlottetown, Edmonton, Fort McMurray, Gatineau, Halifax, Hamilton, Jasper, Kamloops, Kelowna, Kingston, Kitchener, Laval, London, Longueuil, Manitoba, Markham, Mississauga, Moncton, Mont-Tremblant, Montreal, Nanaimo, New Brunswick, Niagara Falls, Niagara on the Lake, Nova Scotia, Ontario, Ottawa, Prince Edward Island, Quebec, Regina, Richmond, Saskatchewan, Saskatoon, Surrey, Toronto, Vancouver, Vaughan, Victoria, Whistler, Whitehorse, Windsor, Winnipeg, Yukon, etc.

Cape Verde: Boa Vista Cape Verde, Sal, etc.

Caribbean Netherlands:, etc.

Cayman Islands: George Town, Grand Cayman, West Bay, etc.

Chad: N'Djamena, etc.

Chile: Antofagasta, Arica, Atacama, Coquimbo, Easter Island, Hanga Roa, Iquique, La Serena, Patagonia, Pucón, Puerto Montt, Puerto Natales, Puerto Varas, Punta Arenas, San Pedro de Atacama, Santiago, Torres del Paine, Valdivia, Valparaíso, Villarrica, Viña del Mar, etc.

China: Anshun, Baishan, Baoding, Baoshan, Baotou, Beijing, Binzhou, Changchun, Changsha, Changzhi, Chengdu, Chongqing, Dali, Dalian, Datong, Dengfeng, Diqing, Dongguan, Emeishan, Foshan, Great Wall of China, Guangdong, Guangzhou, Guilin, Guiyang, Hainan, Hangzhou, Harbin, Honghe, Huashan, Huizhou, Jiangmen, Jiangxi, Jiaxing, Jilin, Jinan, Jincheng, Jingdezhen, Jinzhong, Jiujiang, Jiuzhaigou, Kunming, Langfang, Lanzhou, Laoshan, Leshan, Lhasa, Lianyungang, Lijiang, Linfen, Linyi, Luoyang, Lushan, Lüliang, Mianyang, Nanchang, Nanchong, Nanjing, Nantong, Ngawa, Ningbo, Qiandongnan, Qingdao, Qingyuan, Qinhuangdao, Qufu, Qujing, Rizhao, Sanya, Shanghai, Shangri-La, Shantou, Shanxi, Shaoguan, Shaolin, Shaoxing, Shenyang, Shenzhen, Shigatse, Shijiazhuang, Sichuan, Suzhou, Tai'an, Taiyuan, Taizhou Jiangsu, Tangshan, Tianjin, Tibet, Weifang, Weihai, Wuhan, Wulingyuan, Wutai, Wuxi, Xi'an, Xiamen, Xinzhou, Xishuangbanna, Ya'an, Yanbian, Yangtze, Yangzhou, Yantai, Yellow River, Yibin, Yinchuan, Yiwu, Yuncheng, Yunnan, Zhangjiajie, Zhanjiang, Zhejiang, Zhengzhou, Zhongshan, Zhongwei, Zhoushan, Zhuhai, Zunyi, etc.

Colombia: Barranquilla, Bogotá, Bucaramanga, Cali, Cartagena, Medellín, Pereira, San Andrés, Santa Marta, Villa de Leyva, Villavicencio, etc.

Comoros: Moroni, etc.

Costa Rica: Alajuela, Jacó, La Fortuna, Manuel Antonio, Monteverde, Puerto Viejo de Talamanca, Puntarenas, Quepos, San José, Santa Teresa, Tamarindo, Tortuguero, etc.

Croatia: Baška Voda, Baška, Bibinje, Biograd na Moru, Bol, Brač, Brela, Cavtat, Cres, Dalmatia, Fažana, Hvar, Istria, Ičići, Korčula, Krk, Lopud, Lovran, Lošinj, Makarska, Mali Lošinj, Malinska, Medulin, Mlini, Nin, Novi Vinodolski, Novigrad, Omiš, Opatija, Orebić, Pag, Podstrana, Poreč, Pula, Rab, Rabac, Rijeka, Rovinj, Split, Stari Grad, Sukošan, Supetar, Trogir, Tučepi, Umag, Vrsar, Zadar, Zagreb, Čiovo, Šibenik, etc.

Cuba: Baracoa, Camagüey, Cayo Coco, Cayo Largo, Cayo Santa María, Cienfuegos, Guantánamo, Havana, Holguín, Pinar del Río, Remedios Cuba, Sancti Spíritus, Santa Clara Cuba, Santiago de Cuba, Trinidad, Varadero, Viñales, etc.

Curaçao: Sint Michiel, Westpunt, Willemstad, etc.

Cyprus: Ayia Napa, Coral Bay Cyprus, Famagusta, Kouklia, Kyrenia, Larnaca, Limassol, Nicosia, Paphos, Paralimni, Peyia, Pissouri, Polis, Protaras, etc.

Czech Republic: Bohemia, Brno, Děčín, Frymburk, Frýdek-Místek, Harrachov, Hradec Králové, Jihlava, Karlovy Vary, Kladno, Krkonoše, Kutná Hora, Liberec, Marienbad, Mikulov, Mladá Boleslav, Mělník, Olomouc, Ostrava, Pardubice, Plzeň, Poděbrady, Prague, Teplice, Třeboň, Zlín, Znojmo, Ústí nad Labem, České Budějovice, Český Krumlov, Špindlerův Mlýn, etc.

Democratic Republic of the Congo: Kinshasa, etc.

Denmark: Aalborg, Aarhus, Billund, Copenhagen, Ebeltoft, Esbjerg, Frederikshavn, Greenland, Helsingør, Herning, Hirtshals, Hjørring, Holstebro, Jutland, Odense, Silkeborg, Skagen, Skive, Sønderborg, Vejle, Viborg, etc.

Djibouti: Djibouti City, etc.

Dominican Republic: Boca Chica, Bávaro, Cabarete, La Romana, Las Terrenas, Puerto Plata, Punta Cana, Santiago de los Caballeros, Santo Domingo, Sosúa, etc.

East Timor: Dili, etc.

Ecuador: Baños, Cuenca, Galápagos Islands, Guayaquil, Manta, Otavalo, Puerto Ayora, Puerto López, Quito, Salinas, etc.

Egypt: Abu Simbel, Al Qusair, Alexandria, Aswan, Cairo, Dahab, El Alamein, El Gouna, El Hadaba, Faiyum, Giza, Hurghada, Luxor, Marsa Alam, Mersa Matruh, Naama Bay, Nabq Bay, Nile, Nuweiba, Port Said, Red Sea, Safaga, Sahl Hasheesh, Scharm asch-Schaich, Sharks Bay, Sinai, Suez, Taba, Valley of the Kings, etc.

El Salvador: La Libertad, San Salvador, etc.

Equatorial Guinea: Malabo, etc.

Eritrea: Asmara, etc.

Estonia: Haapsalu, Kuressaare, Narva, Pärnu, Saaremaa, Tallinn, Tartu, etc.

Ethiopia: Addis Ababa, Bahir Dar, Gondar, etc.

Falkland Islands: Stanley, etc.

Faroe Islands: Sørvágur, Tórshavn, etc.

Fiji: Nadi, Suva, Viti Levu Island, etc.

Finland: Espoo, Helsinki, Imatra, Joensuu, Jyväskylä, Jämsä, Kotka, Kuopio, Kuusamo, Lahti, Lapland, Lappeenranta, Levi, Mariehamn, Mikkeli, Moomin World, Naantali, Nilsiä, Oulu, Pori, Porvoo, Pyhätunturi, Rovaniemi, Rukatunturi, Saariselkä, Saimaa, Tampere, Turku, Vaasa, Vantaa, Vuokatti, Åland Islands, etc.

France: Aix-en-Provence, Ajaccio, Alsace, Annecy, Antibes, Aquitaine, Arles, Avignon, Avoriaz, Bayonne, Beaune, Besançon, Biarritz, Bonifacio, Bordeaux, Briançon, Brittany, Burgundy, Cabourg, Cagnes-sur-Mer, Calais, Calvi, Canet-en-Roussillon, Cannes, Carcassonne, Cassis, Chambéry, Chamonix, Colmar, Corsica, Courchevel, Deauville, Dijon, Dunkirk, French Alps, French Riviera, Fréjus, Grenoble, Honfleur, La Ciotat, La Plagne, La Rochelle, Le Grau-du-Roi, Le Havre, Les Arcs, Les Gets, Les Menuires, Lille, Limoges, Lourdes, Lyon, Mandelieu-la-Napoule, Marseille, Megève, Menton, Montpellier, Morzine, Méribel, Nantes, Narbonne, Nice, Nord-Pas-de-Calais, Normandy, Nîmes, Paradiski, Paris, Pas-de-Calais, Perpignan, Portes du Soleil, Porto-Vecchio, Provence, Périgueux, Reims, Rhône-Alpes, Rouen, Saint-Gervais-les-Bains, Saint-Malo, Saint-Martin-de-Belleville, Saint-Rémy-de-Provence, Saint-Tropez, Saintes-Maries-de-la-Mer, Strasbourg, The Three Valleys, Tignes, Toulouse, Trouville-sur-Mer, Val Thorens, Val-d'Isère, Versailles, Étretat, Île-de-France, etc.

French Guiana: Cayenne, Kourou, etc.

French Polynesia: Bora Bora, Mo'orea, Papeete, Tahiti, etc.

Gabon: Libreville, etc.

Gambia: Banjul, Serekunda, etc.

Georgia: Bakuriani, Batumi, Borjomi, Gori, Gudauri, Kobuleti, Kutaisi, Mestia, Mtskheta, Poti, Sighnaghi, Stepantsminda, Tbilisi, Telavi, Zugdidi, etc.

Germany: Aachen, Augsburg, Bad Birnbach, Bad Driburg, Bad Ems, Bad Füssing, Bad Godesberg, Bad Harzburg, Bad Homburg, Bad Kissingen, Bad Kreuznach, Bad Mergentheim, Bad Neuenahr-Ahrweiler, Bad Reichenhall, Bad Salzuflen, Bad Schandau, Baden-Baden, Baden-Württemberg, Bamberg, Bavaria, Berchtesgaden, Bergen auf Rügen, Berlin, Bernkastel-Kues, Bielefeld, Binz, Bochum, Bonn, Bottrop, Brandenburg, Braunlage, Braunschweig, Bremen, Bremerhaven, Brilon, Chemnitz, Cochem, Cologne, Cuxhaven, Dortmund, Dresden, Duisburg, Düsseldorf, Eisenach, Erfurt, Erlangen, Essen, Europa-Park, Flensburg, Frankfurt, Freiburg, Friedrichshafen, Fürth, Füssen, Garmisch-Partenkirchen, Gelsenkirchen, Glowe, Goslar, Görlitz, Göttingen, Hamburg, Hanover, Heidelberg, Heiligendamm, Heligoland, Hesse, Ingolstadt, Inzell, Karlsruhe, Kiel, Koblenz, Krefeld, Lake Constance, Leipzig, Lindau, Lower Saxony, Lübeck, Magdeburg, Mainz, Mannheim, Marburg, Mecklenburg-Vorpommern, Medebach, Monschau, Munich, Mönchengladbach, Mülheim an der Ruhr, Münster, Neuschwanstein Castle, Neuss, Norddeich, Norden, Norderney, North Rhine-Westphalia, Nuremberg, Oberhausen, Oberstdorf, Oldenburg, Olsberg, Osnabrück, Paderborn, Potsdam, Putbus, Quedlinburg, Rathen, Regensburg, Rhineland-Palatinate, Rostock, Rothenburg ob der Tauber, Ruhpolding, Rust, Rügen, Saarbrücken, Saarland, Sassnitz, Saxony, Saxony-Anhalt, Schleswig-Holstein, Schmallenberg, Schwerin, Schönau am Königsee, Sindelfingen, Solingen, Speyer, Stralsund, Stuttgart, Sylt, Thuringia, Travemünde, Trier, Ulm, Warnemünde, Weimar, Wernigerode, Westerland, Wiesbaden, Winterberg, Wolfsburg, Wuppertal, Würzburg, Xanten, Zingst, etc.

Ghana: Accra, Kumasi, etc.

Gibraltar:, etc.

Greece: Acharavi, Aegina, Afantou, Afytos, Agios Gordios, Andros, Arkadia, Athens, Cephalonia, Chania, Chaniotis, Chios, Corfu, Corinth, Crete, Cyclades, Dassia, Delphi, Dodecanese, Faliraki, Halkidiki, Heraklion, Hersonissos, Hydra, Ialysos, Ionian Islands, Kalamata, Kalavryta, Kalymnos, Kardamaina, Karpathos, Kassandra, Kastoria, Katerini, Kavos, Kefalos, Kokkari, Kos, Kriopigi, Laganas, Lefkada, Lemnos, Lesbos, Lindos, Loutraki, Marathokampos, Meteora, Mithymna, Monemvasia, Mount Athos, Mykonos, Mytilene, Nafplio, Naxos, Neos Marmaras, Paleokastritsa, Parga, Patmos, Patras, Pefkochori, Pefkos, Peloponnese, Polychrono, Poros, Pythagoreio, Rethymno, Rhodes, Samos, Samothrace, Santorini, Sidari, Sithonia, Sparta, Spetses, Sporades, Syros, Thasos, Thessaloniki, Tingaki, Zakynthos, etc.

Guadeloupe: Saint-François, etc.

Guam: Tamuning, Tumon, etc.

Guatemala: Antigua Guatemala, etc.

Guinea: Conakry, etc.

Guinea-Bissau: Bissau, etc.

Guyana: Georgetown, etc.

Haiti: Cap-Haitien, Port-au-Prince, etc.

Honduras: Roatán, Tegucigalpa, etc.

Hong Kong: Causeway Bay, Hong Kong Island, Kowloon, Mong Kok, New Territories, Repulse Bay, Tsim Sha Tsui, Wan Chai, etc.

Hungary: Budapest, Eger, Gyula, Hajdúszoboszló, Hévíz, Lake Balaton, Pécs, Siófok, Szeged, Zalakaros, etc.

Iceland: Akureyri, Blue Lagoon, Borgarnes, Egilsstaðir, Garðabær, Hafnarfjörður, Hveragerði, Höfn, Keflavík, Kópavogur, Reykjavik, Selfoss, Vík í Mýrdal, Ísafjörður, etc.

India: Agra, Ahmedabad, Ajmer, Allahabad, Amritsar, Andhra Pradesh, Assam, Aurangabad, Bangalore, Bhopal, Bikaner, Chandigarh, Chennai, Chhattisgarh, Darjeeling, Dehradun, Delhi, Dharamshala, Fatehpur Sikri, Gangtok, Goa, Gujarat, Gurgaon, Guwahati, Gwalior, Haridwar, Himachal Pradesh, Hyderabad, Indore, Jabalpur, Jaipur, Jaisalmer, Jalandhar, Jodhpur, Kanpur, Karnataka, Kerala, Khajuraho, Kochi, Kolhapur, Kolkata, Ladakh, Leh, Lucknow, Ludhiana, Madhya Pradesh, Madikeri, Madurai, Maharashtra, Manali, Mangalore, Mathura, Mount Abu, Mumbai, Munnar, Mussoorie, Mysore, Nagpur, Nainital, Nashik, Navi Mumbai, New Delhi, Noida, Ooty, Pachmarhi, Palakkad, Pune, Punjab, Pushkar, Raipur, Rajasthan, Ramnagar, Rishikesh, Sawai Madhopur, Shimla, Sikkim, Srinagar, Tamil Nadu, Thane, Thiruvananthapuram, Tirupati, Udaipur, Ujjain, Uttar Pradesh, Uttarakhand, Varanasi, Varkala, Vijayawada, Visakhapatnam, etc.

Indonesia: Bali, Balikpapan, Bandung, Batu, Bintan, Bogor, Borobudur, Denpasar, Jakarta, Java, Jimbaran, Kalimantan, Kuta, Lombok, Makassar, Malang, Mataram, Medan, Nusa Dua, Padang, Palembang, Pekanbaru, Sanur, Semarang, Seminyak, Sumatra, Surabaya, Surakarta, Ubud, Yogyakarta, etc.

Iran: Isfahan, Mashhad, Shiraz, Tehran, etc.

Iraq: Baghdad, Basra, Duhok, Erbil, Karbala, Sulaymaniyah, etc.

Ireland: Achill Island, Bray, Bundoran, Carlow, Clifden, Connemara, Cork, Dingle, Donegal, Doolin, Drogheda, Dublin, Dundalk, Ennis, Galway, Glendalough, Kenmare, Kilkenny, Killarney, Letterkenny, Limerick, Navan, Shannon, Swords, Tralee, Waterford, Westport, etc.

Isle of Man: Douglas, etc.

Israel: Acre, Amirim, Arad, Ashdod, Ashkelon, Bat Yam, Beersheba, Caesarea, Dead Sea, Eilat, Ein Bokek, Galilee, Golan Heights, Gush Dan, Haifa, Hermon, Herzliya, Jaffa, Jerusalem, Katzrin, Metula, Mitzpe Ramon, Nahariya, Nazareth, Netanya, Petah Tikva, Ramat Gan, Ramot, Rishon LeZion, Rosh Pinna, Safed, Sea of Galilee, Tel Aviv, Tiberias, Zikhron Ya'akov, etc.

Italy: Abano Terme, Abruzzo, Agrigento, Alassio, Alberobello, Alghero, Amalfi Coast, Aosta Valley, Apulia, Arezzo, Arona, Arzachena, Asciano, Ascoli Piceno, Assisi, Asti, Bardolino, Bari, Basilicata, Baveno, Bellagio, Bellaria-Igea Marina, Benevento, Bergamo, Bologna, Bolzano, Bordighera, Bormio, Bracciano, Brescia, Breuil-Cervinia, Brindisi, Cagliari, Calabria, Campania, Canazei, Caorle, Capri, Carrara, Castelnuovo Berardenga, Castiglion Fiorentino, Castiglione d'Orcia, Castiglione del Lago, Castiglione della Pescaia, Catania, Cefalù, Cervia, Cesenatico, Chianciano Terme, Chieti, Chioggia, Cinque Terre, Città della Pieve, Civitavecchia, Cortina d'Ampezzo, Cortona, Costa Smeralda, Courmayeur, Desenzano del Garda, Dolomites, Elba, Emilia-Romagna, Ercolano, Fasano, Fassa Valley, Ferrara, Finale Ligure, Fiumicino, Florence, Forte dei Marmi, Gaeta, Gallipoli, Genoa, Golfo Aranci, Greve in Chianti, Grosseto, Gubbio, Herculaneum, Imperia, Ischia, Italian Alps, Jesolo, L'Aquila, La Spezia, Lake Como, Lake Garda, Lake Maggiore, Lampedusa, Lazio, Lazise, Lecco, Lerici, Lido di Jesolo, Lignano Sabbiadoro, Liguria, Livigno, Livorno, Lombardy, Lucca, Madonna di Campiglio, Malcesine, Manarola, Mantua, Maratea, Massa, Matera, Menaggio, Merano, Messina, Mestre, Milan, Milazzo, Monopoli, Montalcino, Montecatini Terme, Montepulciano, Monterosso al Mare, Monza, Naples, Nardò, Novara, Olbia, Ortisei, Ostuni, Otranto, Padua, Palermo, Parma, Perugia, Pescara, Peschici, Peschiera del Garda, Piacenza, Piedmont, Pienza, Pisa, Pistoia, Pitigliano, Polignano a Mare, Pompeii, Porto Cervo, Porto Cesareo, Portoferraio, Portofino, Positano, Prato, Ragusa, Rapallo, Rapolano Terme, Ravenna, Riccione, Rimini, Riomaggiore, Riva del Garda, Rome, Salerno, San Casciano dei Bagni, San Gimignano, Sanremo, Sardinia, Savona, Sestriere, Sicily, Siena, Sinalunga, Siracusa, Sirmione, Sorrento, Sottomarina, Sperlonga, Stresa, Sëlva, Taormina, Taranto, Terracina, Tivoli, Torrita di Siena, Trani, Trapani, Trentino-Alto Adige, Trento, Treviso, Trieste, Tropea, Turin, Tuscany, Umbria, Urbino, Val Gardena, Veneto, Venice, Ventimiglia, Verbania, Vernazza, Verona, Vesuvius, Viareggio, Vicenza, Vieste, Viterbo, etc.

Ivory Coast: Abidjan, Assinie-Mafia, Bouaké, San-Pédro, Yamoussoukro, etc.

Jamaica: Kingston, Montego Bay, Negril, Ocho Rios, Port Antonio, Runaway Bay, etc.

Japan: Atami, Fujisawa, Fukuoka, Furano, Hakodate, Hakone, Hakuba, Hamamatsu, Hiroshima, Hokkaido, Ishigaki, Itō, Kagoshima, Kanagawa, Kanazawa, Karuizawa, Kawasaki, Kobe, Kutchan, Kyoto, Lake Suwa, Matsumoto, Miyakojima, Nagasaki, Nagoya, Naha, Nanjō, Nikkō, Okinawa, Onna, Osaka, Sapporo, Sendai, Shizuoka, Takayama, Tokyo, Yokohama, etc.

Jordan: Amman, Aqaba, Irbid, Jerash, Madaba, Petra, Sweimeh, Wadi Musa, Wadi Rum, Zarqa, etc.

Kazakhstan: Aktau, Aktobe, Almaty, Astana, Atyrau, Burabay, Karagandy, Kokshetau, Kostanay, Lake Balkhash, Oskemen, Pavlodar, Semey, Shymbulak, Shymkent, Taraz, etc.

Kenya: Kisumu, Lake Victoria, Masai Mara, Mombasa, Nairobi, Ukunda, etc.

Kiribati: South Tarawa, etc.

Kongo: Brazzaville, Pointe-Noire, etc.

Kosovo: Pristina, Prizren, etc.

Kuwait: Hawally, Kuwait City, Salmiya, etc.

Kyrgyzstan: Bishkek, Bosteri, Cholpon-Ata, Issyk Kul, Karakol, Osh, etc.

Laos: Luang Prabang, Vang Vieng, Vientiane, etc.

Latvia: Cēsis, Daugavpils, Jelgava, Jūrmala, Liepāja, Riga, Rēzekne, Sigulda, Ventspils, etc.

Lebanon: Baalbeck, Beirut, Byblos, Faraya, Jounieh, Mzaar Kfardebian, Tripoli, etc.

Lesotho: Maseru, etc.

Liberia: Monrovia, etc.

Libya: Benghazi, Tripoli, etc.

Liechtenstein: Schaan, Vaduz, etc.

Lithuania: Druskininkai, Kaunas, Klaipėda, Nida, Palanga, Panevėžys, Trakai, Vilnius, Šiauliai, Šventoji, etc.

Luxembourg: Differdange, Dudelange, Echternach, Esch-sur-Alzette, Luxembourg City, Vianden, etc.

Macau:, etc.

Macedonia: Bitola, Mavrovo, Ohrid, Skopje, etc.

Madagascar: Antananarivo, etc.

Malawi: Blantyre, Lilongwe, etc.

Malaysia: Borneo, George Town, Ipoh, Johor Bahru, Johor, Kedah, Kota Bharu, Kota Kinabalu, Kuah, Kuala Lumpur, Kuala Terengganu, Kuantan, Kuching, Langkawi, Malacca, Penang, Putrajaya, Sabah, Sarawak, Selangor, Shah Alam, etc.

Maldives: Kaafu Atoll, Malé, etc.

Mali: Bamako, etc.

Malta: Birżebbuġa, Buġibba, Gozo, Gżira, Mellieħa, Paceville, Pembroke, Qawra, Sliema, St. Julian's, St. Paul's Bay, Valletta, etc.

Martinique: Fort-de-France, Les Trois-Îlets, Sainte-Luce, etc.

Mauritania: Mérida, Nouakchott, Puerto Escondido, Puerto Peñasco, etc.

Mauritius: Port Louis, etc.

Mexico: Acapulco, Akumal, Cabo San Lucas, Cancún, Chetumal, Chichen Itza, Chihuahua, Ciudad Juárez, Cozumel, Cuernavaca, Guadalajara, Guanajuato, Isla Mujeres, Los Cabos, Manzanillo, Mazatlán, Monterrey, Oaxaca, Playa del Carmen, Puebla, Puerto Aventuras, Puerto Morelos, Puerto Vallarta, Querétaro, Riviera Maya, San Cristóbal de las Casas, San Miguel de Allende, San Miguel de Cozumel, Tijuana, Tulum, etc.

Micronesia:, etc.

Moldova: Bălți, Chișinău, Tiraspol, etc.

Monaco: Monte Carlo, etc.

Mongolia: Darkhan, Erdenet, Ulaanbaatar, etc.

Montenegro: Bar, Bečići, Bijela, Budva, Cetinje, Dobra Voda, Dobrota, Herceg Novi, Igalo, Kolašin, Kotor, Miločer, Nikšić, Perast, Petrovac, Podgorica, Prčanj, Sutomore, Sveti Stefan, Tivat, Ulcinj, Žabljak, etc.

Montserrat: Plymouth, etc.

Morocco: Agadir, Asilah, Casablanca, Chefchaouen, El Jadida, Essaouira, Fez, Marrakesh, Meknes, Merzouga, Mohammedia, Nador, Ouarzazate, Rabat, Tangier, Taroudant, Tinghir, Tétouan, etc.

Mozambique: Maputo, etc.

Myanmar: Mandalay, Naypyidaw, Nyaung Shwe, Yangon, etc.

Namibia: Rundu, Swakopmund, Walvis Bay, Windhoek, etc.

Nepal: Chitwan, Himalayas, Kathmandu, Lukla, Lumbini, Mount Everest, Nagarkot, Namche Bazaar, Patan, Pokhara, Tengboche, etc.

Netherlands: 's-Hertogenbosch, Alkmaar, Amersfoort, Amsterdam, Arnhem, Breda, Delft, Domburg, Dordrecht, Eindhoven, Groningen, Haarlem, Leiden, Maastricht, Nijmegen, Noordwijk, Rotterdam, Texel, The Hague, Utrecht, Valkenburg aan de Geul, Wijk aan Zee, Zandvoort, etc.

New Zealand: Auckland, Christchurch, Dunedin, Gisborne, Hamilton, Hastings, Invercargill, Kaikoura, Lower Hutt, Napier, Nelson, New Plymouth, North Island, Palmerston North, Porirua, Queenstown, Rotorua, South Island, Taupo, Tauranga, Waiheke Island, Wanaka, Wellington, Whangarei, etc.

Nicaragua: Granada, Managua, etc.

Nigeria: Abuja, Benin City, Calabar, Enugu, Ibadan, Ilorin, Jos, Kaduna, Lagos, Owerri, Port Harcourt, Uyo, etc.

North Korea: Pyongyang, etc.

Northern Mariana Islands: Saipan, etc.

Norway: Beitostølen, Bergen, Bodø, Gardermoen, Geilo, Geirangerfjord, Hardangerfjord, Hemsedal, Kirkenes, Kristiansand, Larvik, Lillehammer, Lofoten, Narvik, Nordland, Oslo, Sognefjord, Stavanger, Stryn, Svalbard, Tromsø, Trondheim, Ålesund, etc.

Oman: Muscat, Nizwa, Salalah, Seeb, etc.

Pakistan: Bhurban, Faisalabad, Islamabad, Karachi, Lahore, Peshawar, Rawalpindi, etc.

Palau: Koror, Peleliu, etc.

Palestine: Beit Sahour, Bethlehem, Hebron, Jenin, Jericho, Nablus, Ramallah, etc.

Panama: Bocas del Toro, etc.

Papua New Guinea: Port Moresby, etc.

Paraguay: Asunción, Ciudad Del Este, Encarnación, Panama City, etc.

Peru: Arequipa, Ayacucho, Cajamarca, Chiclayo, Cusco, Huancayo, Huanchaco, Huaraz, Ica, Iquitos, Lima, Machu Picchu, Máncora, Nazca, Ollantaytambo, Paracas, Pisco, Piura, Puerto Maldonado, Puno, Tacna, Tarapoto, Trujillo, Urubamba, etc.

Philippines: Angeles City, Antipolo, Bacolod, Bacoor, Baguio, Batangas, Bohol, Boracay, Cagayan de Oro, Calamba, Caloocan, Cebu, Coron, Dasmariñas, Davao, Dumaguete, El Nido, General Santos, Iloilo City, Kalibo, Lapu-Lapu City, Las Piñas, Luzon, Mactan, Makati, Mandaue, Manila, Marikina, Mindanao, Muntinlupa, Olongapo, Palawan, Panglao, Parañaque, Pasay, Pasig, Puerto Galera, Puerto Princesa, Quezon City, Tagaytay, Tagbilaran, Taguig, Valenzuela, Visayas, Zamboanga, etc.

Poland: Białka Tatrzańska, Białowieża Forest, Białystok, Bielsko-Biała, Bukowina Tatrzańska, Bydgoszcz, Elbląg, Gdańsk, Gdynia, Giżycko, Gorzów Wielkopolski, Katowice, Kielce, Kołobrzeg, Kraków, Krynica Morska, Krynica-Zdrój, Lublin, Malbork, Mikołajki, Mrągowo, Olsztyn, Opole, Oświęcim, Poznań, Rzeszów, Sopot, Szczecin, Słubice, Tarnów, Toruń, Tricity, Warsaw, Wrocław, Zakopane, Zielona Góra, Łódź, Świnoujście, etc.

Portugal: Albufeira, Algarve, Aljezur, Almancil, Armação de Pêra, Azores, Braga, Cabanas de Tavira, Carvoeiro, Cascais, Castro Marim, Coimbra, Estoril, Faro, Funchal, Fátima, Guimarães, Lagoa, Lagos, Lisbon, Loulé, Madeira, Monte Gordo, Nazaré, Olhão, Ponta Delgada, Portimão, Porto, Praia da Luz, Quarteira, Sesimbra, Silves, Sintra, Tavira, Vila Real de Santo António, Vila do Bispo, Vilamoura, Évora, etc.

Puerto Rico: Bayamón, Caguas, Carolina, Ponce, San Juan, Vieques, etc.

Qatar: Doha, etc.

Romania: Bran, Brașov, Bucharest, Cluj-Napoca, Constanța, Poiana Brașov, Sibiu, Sighișoara, Timișoara, Transylvania, etc.

Russia: Abakan, Abrau-Dyurso, Abzakovo, Adler, Altai Republic, Alupka, Alushta, Anadyr, Anapa, Angarsk, Arkhangelsk, Arkhipo Osipovka, Arkhyz, Armavir, Astrakhan, Bakhchysarai, Balaklava, Balakovo, Balashikha, Baltic Sea, Barnaul, Belgorod, Belokurikha, Biysk, Black Sea, Blagoveshchensk, Bolshoy Utrish, Bratsk, Bryansk, Caucasian Mineral Waters, Cheboksary, Chelyabinsk, Cherepovets, Cherkessk, Chita, Chornomorske, Crimea, Curonian Spit, Dagomys, Divnomorskoye, Dombay, Domodedovo, Dzerzhinsk, Dzhankhot, Dzhemete, Dzhubga, Elektrostal, Elista, Engels, Estosadok, Feodosia, Foros, Gaspra, Gatchina, Gelendzhik, Golden Ring, Golubitskaya, Gorky Gorod, Gornaya Karusel, Gorno-Altaysk, Goryachy Klyuch, Grozny, Gurzuf, Irkutsk, Ivanovo, Izhevsk, Kabardinka, Kaliningrad, Kaluga, Kamchatka, Kamensk-Uralsky, Karelia, Kazan, Kemerovo, Kerch, Khabarovsk, Khanty-Mansiysk, Khibiny, Khimki, Khosta, Kirov, Kirovsk, Kislovodsk, Kizhi, Koktebel, Kolomna, Komsomolsk on Amur, Konakovo, Koreiz, Korolev, Kostroma, Krasnaya Polyana, Krasnodar Krai, Krasnodar, Krasnogorsk, Krasnoyarsk, Kudepsta, Kurgan, Kursk, Kyzyl, Lake Baikal, Lake Seliger, Lazarevskoye, Lipetsk, Listvyanka, Loo, Lyubertsy, Magadan, Magnitogorsk, Makhachkala, Massandra, Matsesta, Maykop, Miass, Mineralnye Vody, Moscow, Mount Elbrus, Murmansk, Murom, Mytishchi, Naberezhnye Chelny, Nakhodka, Nalchik, Naryan-Mar, Nebug, Nizhnekamsk, Nizhnevartovsk, Nizhny Novgorod, Nizhny Tagil, Norilsk, Novokuznetsk, Novorossiysk, Novosibirsk, Novyi Svit, Novyy Urengoy, Obninsk, Odintsovo, Olginka, Omsk, Orenburg, Orsk, Oryol, Partenit, Penza, Pereslavl Zalessky, Perm, Pervouralsk, Petergof, Petropavlovsk-Kamchatsky, Petrozavodsk, Plyos, Podolsk, Popovka, Primorsko-Akhtarsk, Pskov, Pulkovo, Pushkin, Pushkino, Pyatigorsk, Repino, Rosa Khutor, Rostov-on-Don, Ryazan, Rybachye, Rybinsk, Saint Petersburg, Sakhalin, Saky, Salekhard, Samara, Saransk, Saratov, Sea of Azov, Sergiyev Posad, Serpukhov, Sestroretsk, Sevastopol, Shakhty, Sheregesh, Sheremetyevo, Siberia, Simeiz, Simferopol, Smolensk, Sochi, Solovetsky Islands, Sortavala, Stary Oskol, Stavropol, Sterlitamak, Sudak, Sukko, Surgut, Suzdal, Svetlogorsk, Syktyvkar, Syzran, Taganrog, Taman, Tambov, Tarusa, Temryuk, Terskol, Tobolsk, Tolyatti, Tomsk, Torzhok, Tuapse, Tula, Tver, Tyumen, Ufa, Uglich, Ukhta, Ulan-Ude, Ulyanovsk, Usinsk, Ussuriysk, Utes, Valaam, Valday, Vardane, Velikiye Luki, Veliky Novgorod, Veliky Ustyug, Vityazevo, Vladikavkaz, Vladimir, Vladivostok, Vnukovo International Airport, Volga, Volgograd, Vologda, Volzhskiy, Vorkuta, Voronezh, Vyborg, Yakhroma, Yakornaya Shchel, Yakutsk, Yalta, Yaroslavl, Yekaterinburg, Yelets, Yenisei, Yessentuki, Yevpatoria, Yeysk, Yoshkar-Ola, Yuzhno-Sakhalinsk, Zavidovo, Zelenogradsk, Zheleznovodsk, Zhukovsky, Zvenigorod, etc.

Rwanda: Butare, Gisenyi, Kibuye, Kigali, etc.

Réunion: Saint-Denis, etc.

Saint Barthélemy: Gustavia, etc.

Saint Kitts and Nevis: Basseterre, etc.

Saint Lucia: Anse La Raye, Castries, Gros Islet, Soufrière, etc.

Saint Martin:, etc.

Saint Vincent and the Grenadines: Kingstown, etc.

Samoa: Apia, etc.

San Marino: City of San Marino, etc.

Saudi Arabia: Abha, Al Khobar, Buraydah, Dammam, Jeddah, Jizan, Jubail, Mecca, Medina, Riyadh, Ta'if, Tabuk, Yanbu, etc.

Senegal: Dakar, etc.

Serbia: Belgrade, Kopaonik, Niš, Novi Sad, Palić, Stara Planina, Subotica, Zlatibor, etc.

Seychelles: La Digue, Mahé, Praslin, etc.

Sierra Leone: Freetown, etc.

Singapore: Changi, Sentosa, etc.

Sint Maarten:, etc.

Slovakia: Bratislava, Jasná, Liptov, Tatranská Lomnica, Vysoké Tatry, Štrbské Pleso, etc.

Slovenia: Bled, Bohinj, Bovec, Kranjska Gora, Ljubljana, Maribor, Piran, Portorož, Rogaška Slatina, etc.

Solomon Islands: Honiara, etc.

Somalia: Mogadishu, etc.

Somaliland: Hargeisa, etc.

South Africa: Ballito, Benoni, Bloemfontein, Boksburg, Cape Town, Drakensberg, Durban, East London, George, Johannesburg, Kempton Park, Kimberley, Knysna, Kruger National Park, Marloth Park, Mossel Bay, Nelspruit, Pietermaritzburg, Plettenberg Bay, Polokwane, Port Elizabeth, Potchefstroom, Pretoria, Rustenburg, Sandton, Stellenbosch, Umhlanga, etc.

South Korea: Busan, Daegu, Daejeon, Gangneung, Gapyeong, Gwangju, Gwangyang, Gyeongju, Incheon, Jejudo, Jeonju, Pyeongchang, Seogwipo, Seoul, Sokcho, Suwon, Ulsan, Yangyang, Yeosu, etc.

Spain: A Coruña, Alcúdia, Algeciras, Alicante, Almería, Altea, Andalusia, Antequera, Aragon, Asturias, Ayamonte, Baiona, Balearic Islands, Barbate, Barcelona, Basque Country, Benalmádena, Benidorm, Benissa, Besalú, Bilbao, Blanes, Buñol, Cadaqués, Cala d'Or, Calella, Calonge, Calp, Calvià, Cambados, Cambrils, Canary Islands, Cangas de Onís, Cantabria, Cartagena, Castilla-La Mancha, Catalonia, Chiclana de la Frontera, Costa Blanca, Costa Brava, Costa Dorada, Costa del Maresme, Costa del Sol, Cádiz, Córdoba, Dénia, El Puerto de Santa María, Empuriabrava, Estepona, Figueres, Formentera, Fuerteventura, Galicia, Gijón, Girona, Gran Canaria, Granada, Ibiza, Jerez de la Frontera, L'Escala, L'Estartit, L'Hospitalet de Llobregat, La Pineda, Lanzarote, Llançà, Lleida, Lloret de Mar, Madrid, Magaluf, Malgrat de Mar, Mallorca, Marbella, Maspalomas, Menorca, Mijas, Mojácar, Moraira, Murcia, Málaga, Navarre, Nerja, O Grove, Ourense, Oviedo, Palma Nova, Palma, Pals, Poio, Pollença, Pontevedra, PortAventura, Portonovo, Ronda, Roquetas de Mar, Roses, Salamanca, Salou, San Sebastian, Sant Antoni de Portmany, Santander, Santiago de Compostela, Santillana del Mar, Sanxenxo, Seville, Sidges, Sierra Nevada, Tarifa, Tarragona, Tenerife, Toledo, Torremolinos, Torrevieja, Torroella de Montgrí, Tossa de Mar, Valencia, Vigo, Vélez-Málaga, Xàbia, Zaragoza, etc.

Sri Lanka: Anuradhapura, Bentota, Beruwala, Colombo, Dambulla, Galle, Hikkaduwa, Jaffna, Kandy, Mirissa, Negombo, Nuwara Eliya, Sigiriya, Tangalle, Trincomalee, Unawatuna, Weligama, etc.

Sudan: Khartoum, Port Sudan, etc.

Suriname: Lelydorp, Nieuw Nickerie, Paramaribo, etc.

Swaziland: Lobamba, Mbabane, etc.

Sweden: Bohuslän, Borgholm, Borlänge, Dalarna, Falkenberg, Falun, Gothenburg, Gotland, Halmstad, Helsingborg, Jönköping, Kalmar, Karlshamn, Karlskrona, Karlstad, Kiruna, Kristianstad, Linköping, Lund, Malmö, Norrköping, Solna, Stockholm, Umeå, Uppsala, Vimmerby, Visby, Västerås, Växjö, Ystad, Ängelholm, Åre, Öland, Örebro, Östersund, etc.

Switzerland: Adelboden, Andermatt, Anzère, Arosa, Ascona, Basel, Bellinzona, Bern, Crans-Montana, Davos, Engelberg, Fribourg, Geneva, Grindelwald, Grächen, Gstaad, Haute-Nendaz, Interlaken, Jungfrau, Klosters, Lake Maggiore, Lausanne, Lauterbrunnen, Leukerbad, Locarno, Lucerne, Lugano, Matterhorn, Montreux, Nendaz, Neuchâtel, Pontresina, Portes du Soleil, Saanen, Saas-Fee, Sierre, Silvaplana, Sion, St. Gallen, St. Moritz, Swiss Alps, Ticino, Valais, Verbier, Vevey, Veysonnaz, Wengen, Zermatt, Zug, Zürich, etc.

Syria: Aleppo, Damascus, Deir ez-Zor, Latakia, Palmyra, Tartus, etc.

Taiwan: Hsinchu, Kaohsiung, Taichung, Tainan, Taipei, etc.

Tajikistan: Dushanbe, Isfara, Khujand, etc.

Tanzania: Dar es Salaam, Mount Kilimanjaro, Serengeti, Zanzibar, etc.

Thailand: Ayutthaya, Bangkok, Chiang Mai, Chiang Rai, Chonburi, Hua Hin, Kanchanaburi, Karon, Khao Sok, Ko Chang, Ko Lanta, Ko Phangan, Ko Samui, Krabi, Pai, Patong, Pattaya, Phi Phi Islands, Phuket, Prachuap Khiri Khan, Ranong, River Kwai, Udon Thani, etc.

Togo: Lomé, etc.

Tonga: Nukuʻalofa, Tunis, etc.

Trinidad and Tobago: Port of Spain, etc.

Tunisia: Djerba, Hammamet, Midoun, Monastir, Port El Kantaoui, Sousse, etc.

Turkey: Adana, Alacati, Alanya, Ankara, Antakya, Antalya, Ayvalık, Beldibi, Belek, Bodrum, Bozcaada, Bursa, Büyükada, Cappadocia, Dalyan, Datça, Denizli, Didim, Edirne, Ephesus, Erzincan, Erzurum, Eskişehir, Fethiye, Gaziantep, Göreme, Göynük, Istanbul, Kalkan, Kayseri, Kaş, Kemer, Konakli, Konya, Kuşadası, Lara, Mahmutlar, Manavgat, Marmaris, Mersin, Olympos, Palandöken, Pamukkale, Prince Islands, Samsun, Sapanca, Sarıkamış, Selçuk, Side, Tarsus, Tekirova, Trabzon, Troy, Turkish Riviera, Uludağ, Van, Çamyuva, Çanakkale, Çeşme, Çıralı, Ölüdeniz, Ürgüp, İskenderun, İzmir, İçmeler, Şanlıurfa, etc.

Turkmenistan: Ashgabat, Avaza, etc.

Turks and Caicos Islands: Cockburn Town, North Caicos, Pine Cay, Providenciales, etc.

Uganda: Kampala, etc.

Ukraine: Berdiansk, Bila Tserkva, Boryspil, Bukovel, Cherkasy, Chernihiv, Chernivtsi, Dnipropetrovsk, Donetsk, Ivano-Frankivsk, Kamianets-Podilskyi, Kharkiv, Kherson, Kiev, Koblevo, Kremenchuk, Kryvyi Rih, Luhansk, Lviv, Mariupol, Melitopol, Mykolaiv, Odessa, Poltava, Slavske, Sumy, Truskavets, Uzhgorod, Vinnytsia, Yaremche, Yasinya, Zaporizhia, Zatoka, Zhytomyr, etc.

United Arab Emirates: Abu Dhabi, Ajman, Dubai, Persian Gulf, Ras Al Khaimah, Sharjah, etc.

United Kingdom: Aberdeen, Bath, Belfast, Blackpool, Bournemouth, Bradford, Brighton, Bristol, Cambridge, Canterbury, Cardiff, Channel Tunnel, Cheltenham, Chester, Cornwall, Coventry, Cumbria, Derry, Devon, Dorset, Dover, Eastbourne, Edinburgh, England, English Channel, Exeter, Folkestone, Fort William, Glasgow, Hampshire, Harrogate, Inverness, Isle of Wight, Kent, Lancashire, Leeds, Leicester, Liverpool, Llandudno, London, Manchester, Mansfield, Milton Keynes, Newcastle, Newquay, Northern Ireland, Norwich, Nottingham, Oban, Oxford, Paignton, Plymouth, Portmeirion, Portsmouth, Reading, Sandown, Scarborough, Scotland, Shanklin, Sheffield, Somerset, Southampton, St Albans, Stonehenge, Sussex, Swansea, Torquay, Wales, Whitby, Windsor, York, etc.

United States: Akron, Alabama, Alaska, Albuquerque, Amarillo, Anaheim, Anchorage, Ann Arbor, Arizona, Arkansas, Arlington, Aspen, Atlanta, Aurora, Austin, Bakersfield, Baltimore, Baton Rouge, Beaver Creek, Big Bear Lake, Billings, Biloxi, Birmingham, Boca Raton, Boise, Boston, Breckenridge, Brooklyn, Buffalo, California, Carlsbad, Carmel-by-the-Sea, Chandler, Charlotte, Chesapeake, Cheyenne, Chicago, Chula Vista, Cincinnati, Clearwater, Cleveland, Colorado Springs, Colorado, Columbus Georgia, Columbus, Connecticut, Corpus Christi, Costa Mesa, Cupertino, Dallas, Dana Point, Daytona Beach, Death Valley, Delaware, Delray Beach, Denver, Des Moines, Destin, Detroit, Durham, El Paso, Estes Park, Fargo, Fayetteville, Florida, Fontana, Fort Lauderdale, Fort Myers, Fort Walton Beach, Fort Wayne, Fort Worth, Fremont, Fresno, Galveston, Garland, Georgia, Gilbert, Glendale, Grand Canyon, Grand Rapids, Grand Teton, Great Smoky Mountains, Greensboro, Gulfport, Hawaii, Henderson, Hialeah, Hollywood, Honolulu, Hot Springs, Houston, Huntington Beach, Idaho, Illinois, Indiana, Indianapolis, Iowa, Irving, Jackson Mississippi, Jackson Wyoming, Jacksonville, Jersey City, Juneau, Kansas City, Kansas, Kentucky, Key Largo, Key West, La Jolla, Laguna Beach, Lahaina, Lake Tahoe, Laredo, Las Vegas, Lexington, Lincoln, Little Rock, Long Beach, Los Angeles, Louisiana, Louisville, Lubbock, Madison, Maine, Malibu, Mammoth Lakes, Manhattan, Marathon, Maryland, Massachusetts, Memphis, Mesa, Mexico City, Miami Beach, Miami, Michigan, Milwaukee, Minneapolis, Minnesota, Mississippi, Missouri, Moab, Modesto, Montana, Monterey, Montgomery, Moreno Valley, Mountain View, Myrtle Beach, Napa, Naples, Nashville, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New Orleans, New York City, New York, Newark, Newport Beach, Newport, Norfolk, North Carolina, North Dakota, North Las Vegas, Oakland, Ocean City, Oceanside, Ohio, Oklahoma City, Oklahoma, Omaha, Oregon, Orlando, Oxnard, Palm Coast, Palm Desert, Palm Springs, Palo Alto, Panama City Beach, Park City, Pasadena, Pennsylvania, Pensacola, Philadelphia, Phoenix, Pittsburgh, Plano, Pompano Beach, Portland, Portland, Providence, Raleigh, Reno, Rhode Island, Richmond, Riverside, Rochester, Rocky Mountains, Sacramento, Saint Paul, Salt Lake City, San Antonio, San Bernardino, San Diego, San Francisco, San Jose, Sanibel, Santa Ana, Santa Barbara, Santa Cruz, Santa Fe, Santa Monica, Sarasota, Savannah, Scottsdale, Seattle, Shreveport, Silicon Valley, South Carolina, South Dakota, South Lake Tahoe, Spokane, Springfield, Squaw Valley, St. Augustine, St. Louis, St. Petersburg, Steamboat Springs, Stockton, Sunny Isles Beach, Sunnyvale, Tacoma, Tallahassee, Tampa, Telluride, Tennessee, Texas, Thousand Oaks, Toledo, Tucson, Tulsa, Utah, Vail, Vermont, Virginia Beach, Virginia, Waikiki, Washington D.C., Washington, West Palm Beach, West Virginia, Wichita, Winston-Salem, Wisconsin, Wyoming, Yellowstone, Yonkers, Yosemite, Zion, etc.

Uruguay: Montevideo, Punta del Este, etc.

Uzbekistan: Bukhara, Fergana, Khiva, Kokand, Navoiy, Samarkand, Tashkent, Urgench, etc.

Vanuatu: Port Vila, etc.

Vatican:, etc.

Venezuela: Caracas, Isla Margarita, Maracaibo, Porlamar, etc.

Vietnam: Cần Thơ, Da Lat, Da Nang, Haiphong, Hanoi, Ho Chi Minh City, Huế, Hạ Long, Hội An, Long Hải, Mỹ Tho, Nha Trang, Ninh Bình, Phan Thiết, Phú Quốc, Qui Nhơn, Rạch Giá, Sa Pa, Vũng Tàu, Đồng Hới, etc.

Yemen: Aden, Sana'a, etc.

Zambia: Livingstone, Lusaka, etc.

Zimbabwe: Bulawayo, Harare, Mutare, Victoria Falls, etc.


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