内置的止动装置为动力执行机构提供行程保护，并且作为参考坐标在开启和关闭位置定位阀瓣。

Internal stops provide positive over travel protection for power actuated valves and act as a reference to position the discs in the open and closed positions.

youdao

内置的止动装置为动力执行机构提供行程保护，并且作为参考坐标在开启和关闭位置定位阀瓣。

Internal stops provide positive over travel protection for power actuated valves and act as a reference to position the discs in the open and closed positions.

youdao