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ventilation after large-scale blasting
expl.
大爆破后通风
稀释和排出大爆破所产生的炮烟和粉尘的通风措施。按爆破作业的要求,应在较短时间内,使大爆破所产生的大量炮烟和粉尘降低到允许浓度,因而需要较大的风量
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