ball-and-lever valve

例句：

1. 1.The ball-and-lever valveis used to control the flow of oilin a pipeline.
   球阀和杠杆阀用于控制管道中油的流动。
2. 2. The engineercarefully inspected the ball-and-lever valve before installing it.
   工程师在安装前仔细检查了球阀。
3. 3. The ball-and-lever valve was designedto prevent leaks and ensure safe operationof the system.
   球阀被设计成防止泄漏并确保系统的安全运行。