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在露天和地下爆破工作中,广泛采用电气爆破。在敷设复杂的电爆线路时,必须对一些个别的区段进行中间检查。但是,为此
In the open air and underground blasting work, widely used electrical blasting. In the laying of complex electric burst lines, some individual sections must be checked in the middle. But for that reason