wheel and axle

Noun

 * 1) A simple machine consisting of a wheel (or similar lever) that turns an axle around which a cord is wound; its mechanical advantage is the ratio of the diameters of the wheel and axle.

Translations

 * Bulgarian:
 * Chinese:
 * Mandarin:
 * Czech: kolo na hřídeli
 * Finnish: pyörä ja akseli
 * Japanese: 輪軸
 * Polish:
 * Spanish: