bellows operated pilot valve

例句：

1. 1. Thebellows operated pilot valve is responsiblefor controlling the flow of air in theengine.
   风箱操作的先导阀门负责控制发动机中空气的流动。
2. 2. The pilot valveis a crucial component that regulates thepressure in the system.
   先导阀是调节系统中压力的关键部件。
3. 3. The bellows operatedpilot valve was designed to improve efficiency andreduce noise in the engine.
   风箱操作的先导阀被设计用来提高效率并减少发动机中的噪音。