It can easily be configured as single - or double-acting for rotary actuators.
它可以很容易地配置为单作用或双作用两种形式，从而用于旋转执行器。
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.
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。
Pneumatic piston actuators can be divided into single and double acting two.
气动活塞式执行机构可分为单作用和双作用两种。
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