1、Smooth and finish the crankpin to roundness.
把曲柄銷磨光并精加工到正圓。

2、As the crankshaft rotates, the crankpin swings in a circle around the shaft.
隨著曲軸的轉動，曲柄銷繞主軸作圓周擺動。

3、The cap and rod have bearings which permit the crankpin to rotate freely within the rod.
軸瓦蓋和連桿中有軸瓦，它允許連桿內的曲柄鎖自由地轉動。

crankpin翻譯