vacuum piston plate

例句：

1. 1.The vacuum piston is designed to reduce friction in the engine.
   真空活塞设计用于减少发动机中的摩擦。
2. 2. The vacuum piston plate is essential for maintaining the engine's efficiency.
   真空活塞板对于保持发动机效率至关重要。
3. 3.The vacuum piston plate was replaced due to wear and tear.
   由于磨损，真空活塞板被更换了。