exhaust pipe with hinged flaps

例句：

1. 1.The exhaust pipe with hinged flaps is designed to reduce noise and improve airflow.
   带有铰链式活门的排气管设计用来降低噪音和改善空气流动。
2. 2. The exhaust pipe with hinged flaps is a crucial component in the engine's performance.
   带有铰链式活门的排气管是发动机性能的关键组成部分。
3. 3. The exhaust pipe with hinged flaps is used to direct exhaust gases away from the engine.
   带有铰链式活门的排气管用于将废气导向远离发动机的方向。