Can be used in Zone 20 zone 21 and Zone 22 dangerous places. Can be used in explosive or flammable dust atmosphere.
粉尘防爆照明应急两用灯，21区，22区危险场所。 含有爆炸性或可燃性粉尘环境。
Submersible sewage pump in the air can contain explosive methane or coal dust in the safe use of the mine.
潜污电泵可以在空气中含有甲烷或爆炸性煤尘的矿井中安全使用。
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