1 before the fire, steam boiler, should check the valve pipe, steam pipe, pressure gauge, safety valve, water level gauge, drain valve is in good condition.
蒸汽锅炉生火之前，应检查各阀门水管、汽管、压力表、安全阀、水位表、排污阀等是否处在完好状态。
The utility model has reasonable structure, good check valve action and fire prevention action, easy assembly, long service life, stable performance and good effect.
本实用新型结构合理，具有良好的止回阀作用和防火作用，安装方便，使用寿命长，性能稳定，效果好。
The utility model has reasonable structure, good check valve action and fire prevention action, easy assembly, long service life, stable performance and good effect.
本实用新型结构合理，具有良好的止回阀作用和防火作用，安装方便，使用寿命长，性能稳定，效果好。
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