butterfly throttle valve

例句：

1. 1.The butterfly throttle valve is responsible for controlling the flow of oil in the engine.
   蝴蝶式节流阀负责控制发动机中油的流动。
2. 2. The engineers had to replace the butterfly throttle valve due to its failure.
   由于阀门故障，工程师们不得不更换它。
3. 3.The butterfly throttle valve was designed to improve fuel efficiency and reduce emissions.
   蝴蝶式节流阀的设计旨在提高燃油效率并减少排放。