power on shaft

例句：

1. 1. The power on shaft is responsible for the rotation of the machine.
   动力轴负责机器的旋转。
2. 2. The engineer had to replace the power on shaft because it was worn out.
   工程师不得不更换磨损的动力轴。
3. 3. The new design of the power on shaft has greatly improved the efficiency of the machine.
   新设计的功率轴大大提高了机器的效率。