servo-piston

例句：

1. 1.The servo-piston system is responsible for controlling the movement of the robot arm.
   伺服活塞系统负责控制机器人手臂的运动。
2. 2.In the engine, the servo-piston moves up and down to turn the crankshaft.
   在发动机中，伺服活塞上下移动以转动曲轴。
3. 3.The servo-piston mechanism is used in many industrial applications to control the speed and direction of a machine.
   伺服活塞机构被广泛用于许多工业应用中，用于控制机器的速度和方向。