Pbg type flameproof high voltage vacuum power distribution set series and bbd type flameproof low voltage protection case series are appropriate to environment with explode gas in underground coal mine Pbg型矿用隔爆型高压真空配电装置系列和bbd型矿用隔爆型低压保护箱系列，适用于煤矿井下具有爆炸性气体的环境中。
