电动或液动插板阀通常与非金属密封蝶阀配系运用。

Electric or hydraulic flapper valves are usually equipped with non-metal sealing butterfly valve system to use.

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电动或液动插板阀通常与非金属密封蝶阀配系运用。

Electric or hydraulic flapper valves are usually equipped with non-metal sealing butterfly valve system to use.

youdao