star valve

例句：

1. 1. The star valve isresponsible for controlling the flow of gasesthrough the engine.
   星阀负责控制气体通过发动机的流动。
2. 2. The engineers were tasked with replacing the old star valve witha new one.
   工程师们被指派用新的代替旧的星阀。
3. 3. The starvalve was designed to improve the efficiency ofthe system.
   星阀的设计旨在提高系统的效率。