pump plunger shaft

例句：

1. 1.The pump plunger shaft is the part of the pump that moves the piston up and down.
   泵柱塞轴是泵中使活塞上下移动的部分。
2. 2.The pump plunger shaft needs to be lubricated regularly to prevent wear and tear.
   泵柱塞轴需要定期润滑，以防止磨损。
3. 3.The pump plunger shaft is responsible for transferring fluid from the reservoir to the pump chamber.
   泵柱塞轴负责将流体从储液器传输到泵腔。