空气或燃气缸体执行机构包括单动或双动，由机械弹簧或气动力实现故障开启或关闭等各种类型。

Air or gas cylinder actuators include single or double acting, fail open or closed by mechanical spring or pneumatic force. They can be manufactured to accommodate any length stroke.

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换档执行机构的类型包括滑动齿轮、啮合套、同步器、换档离合器和自由轮，其中同步器是汽车变速器中广泛使用的执行元件。

Shift actuator has five different types, such as sliding gears, gear sets, synchronizer, gear clutch and free wheel. And the synchronizer is widely used in automotive transmission.

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对于大型阀门，重型VS系列挡车轭类型的涡轮执行机构能够提供非线性特性的扭矩，具有最好的机械性能，适用于阀座和无阀座阀门。

For larger valves, heavy duty VS series scotch yoke type actuators provide nonlinear torque characteristic with the highest possible mechanical advantage for seating and unseating the valve.

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