注意：双阀瓣止回阀能够安装在水平或流向朝上的垂直位置。

NOTE: Twin Disc Check Valves can be installed horizontally or in the vertical position with flow up.

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为了安全起见我们要在取样点设双阀以便于安全的压降，取样口还要加护罩。

For safety we should use dual valves to aid safe pressure reduction, and cap the sample outlets.

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介绍了一种新型的压力先导控制伺服阀，该阀的功率放大级采用双阀芯结构代替传统单阀芯结构。

A new servovalve using a pressure control pilot state was introduced, which USES two spools instead of single spool in power magnifying stage.

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