fail-safe close valve
... fail-closed 出故障时自动关闭的 fail-safe close valve 故障自动关闭阀 fail-safe control 故障控制 ...
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气体灭火控制器主要具有各种故障报警及关闭风机、防火阀等联动功能，并实现建手动、自动、报警、故障、喷放等信号反馈至消防联动控制中心。
Gas fire controller has various functions such as failure alarm, closing blower fan and fire damper, and can feedback manual, automatic, alarming, failure and spray signals to the fire control centre.
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