輪りん軸じく

noun

wheel and axle

A simple machine consisting of a wheel attached to a smaller axle so that the two parts rotate together, used to amplify force. This is a technical term in physics and engineering.

• 輪りん軸じくは、てこや滑かっ車しゃと同おなじく、基き本ほん的てきな単たん純じゅん機き械かいの一ひとつです。

  The wheel and axle, like the lever and pulley, is one of the fundamental simple machines.