滑かっ車しゃ

noun

pulley; block; tackle

A wheel with a grooved rim for a rope or cable, used to change the direction of a force or gain mechanical advantage. In compound terms, it can refer to a block-and-tackle system.

• 工こう事じ現げん場ばで滑かっ車しゃを使つかって重おもい資し材ざいを持もち上あげた。

  They lifted heavy materials using a pulley at the construction site.

• 滑かっ車しゃの原げん理りを利り用ようすると、小ちいさな力ちからで大おおきな荷に物もつを動うごかせる。

  By using the principle of the pulley, you can move a large load with a small force.