... saturated steam safety valve 饱和蒸汽安全门 steam supply valve 供汽阀 main steam isolation valve 主蒸汽止回阀 ...
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Before feeding water, air vent valves, pressure gauge valve, water level gauge, burner supply valve and steam supply valve should be opened fully. Other valves and checking manhole close.
上水时，空气阀、压力表阀及水位计通汽通水阀开足，其他阀门和检查门无孔门应一律关闭。
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