阀门的启闭位置由行程开关控制，且阀板上设有限位挡块以保证阀板的启闭位置。

There is limit block on the valve disc to ensure the open-close position , which is controlled by the stroke switch.

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阀门的启闭位置由行程开关控制，且阀板上设有限位挡块以保证阀板的启闭位置。

There is limit block on the valve disc to ensure the open-close position , which is controlled by the stroke switch.

youdao