piston type pressure controller

例句：

1. 1.The piston type pressure controller is used to control the flow of oil in the engine.
   活塞式压力控制器用于控制发动机中油的流动。
2. 2. The piston type pressure controller was designed to improve efficiency and reduce emissions.
   活塞式压力控制器被设计来提高效率和减少排放。
3. 3. The piston type pressure controller is essential for maintaining proper engine performance.
   活塞式压力控制器对于保持发动机正常运行至关重要。