Tension
131Tension ring — A tension ring is a type of finger ring in which the gemstone is held in place by pressure rather than prongs, a bezel or other mounting. The metal setting is actually spring loaded to exert pressure onto the gemstone, and tiny etchings/grooves… …
132Tension superficielle — La tension superficielle permet à un pengő hongrois en aluminium de ne pas couler au fond du verre d eau (bien que l aluminium soit plus dense que l eau)… …
