stepped drive shaft

• 阶梯传动轴

stepped drive shaft的用法和样例：

例句

1. Remove the rear propeller shaft.
   拆卸后传动轴。
2. Hence, the countershaft and all its rigidly connected gears are in motion whenever the drive shaft revolves.
   因此，当驱动轴旋转时，副传动轴及与其刚性连接的齿轮都处于运动中。