automatic control valve

例句：

1. 1.The automatic control valve regulates the flow of oil in the engine.
   自动控制阀调节发动机中油的流动。
2. 2. The automatic control valve is used to prevent overheating in the engine.
   自动控制阀用于防止发动机过热。
3. 3.The engineer replaced the old automatic control valve with a new one.
   工程师用一个新的自动控制阀替换了旧的。