valve lifter roller pin

例句：

1. 1.The valve lifter is essential for maintaining the proper flow of oil through the engine.
   阀杆提升器对于保持机油通过发动机的正确流动至关重要。
2. 2. The roller pin in the pump was damaged, causing a significant drop in efficiency.
   泵中的滚柱损坏，导致效率大幅下降。
3. 3.In this part of the machine, the valve lifter and roller pin work together to control the flow of gases.
   在这个机器的部分中，阀门提升器和滚柱一起工作来控制气体的流动。