exhaust-valve cam

例句：

1. 1.The exhaust valve cam is used to control the flow of exhaust gases from the engine.
   排气阀凸轮用于控制发动机排放废气的流量。
2. 2. The exhaust valve cam is crucial for maintaining proper engine performance.
   排气阀凸轮对于保持发动机性能至关重要。
3. 3.The exhaust valve cam is designed to minimize vibration and noise during operation.
   排气阀凸轮设计成在运行过程中尽量减少振动和噪音。