闸把

例句：

1. 1. The engineer had to adjust the hydraulic valves to control the water flow.
   工程师必须调整液压阀门来控制水流。
2. 2. The train's brake system is controlled by a switch on the train's side.
   火车的刹车系统由火车侧面的一个开关控制。
3. 3. The pilot used a joystick to operate the throttle, which was connected to the engine's throttlebody.
   飞行员使用操纵杆来操作油门，油门与发动机的节气门体相连。