crankshaft

详细解释:n. 曲轴
【机】 曲柄轴

英语解释：

名词 crankshaft:

a rotating shaft driven by (or driving) a crank

详细解释：

crank.shaft

n.（名词）
A shaft that turns or is turned by a crank.
机轴：用曲柄来转动的轴