放气瓣

例句：

1. 1. The car's engine has agasket on the exhaust pipe to preventair from leaking out.
   汽车的发动机在排气管上有一个垫圈，以防止空气泄漏。
2. 2. The engineer replaced the faultyvalve with a new one to fix theproblem.
   工程师用一个新的阀门替换了故障阀门来解决问题。
3. 3. The valve is designed to controlthe flow of oil and gases throughthe engine.
   这个阀门设计用来控制油和气体通过发动机的流动。