Valve actuation utilizes a mechanical power device, an actuator, to operate a valve.
阀门执行机构是一种采用机械力的设备，一台执行机构操作一个阀门。
The valve actuating device is installed in another room.
阀门传动装置安装在另一舱室。
The open angle indicating device should display the open state of the valve gate exactly.
开度指示机构应准确地显示阀门的开启状态。
Design and develop the device of motorcycle engine valve phase measuring system.
摩托车发动机气门相位测量装置的设计开发。
Use security device of hydraulic control valve to ensure the safety.
使用液控单向阀的安全装置，保证安全；
Use security device of hydraulic control valve to ensure the safety.
使用液控单向阀的安全装置，保证安全；
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