lever-operated valve

例句：

1. 1.The lever-operated valve is used to control the flow of oil in the engine.
   杠杆操作阀门用于控制发动机中油的流动。
2. 2. The lever-operated valve is a critical component of the brake system.
   杠杆操作阀门是制动系统的关键部件。
3. 3.The lever-operated valve was designed to improve efficiency and reduce maintenance costs.
   杠杆操作阀门的设计旨在提高效率并减少维护成本。