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1·The fire extinguisher is filled with chemical foam.

这个灭火器充满了化学泡沫。

2·Fire control devices such as fire extinguisher, hydrant water supplying system, AFFF system and foam-water spray extinguishing system are used in this tunnel.

隧道消防设施采用灭火器+消火栓给水系统+固定式水成膜泡沫灭火装置+泡沫-细水雾灭火系统。

3·The foam extinguisher is most effective to put out fire of oils.

泡沫 灭火器 扑救油类火灾最有效。