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双重装药或双重装填
一个钻孔中被一定量的惰性材料〈钻屑、黏土、砂〉隔开的装填炸药,目的是合理分配炸药能量,或防止部分炸药在某一层面或裂隙被吹出来,为防止后一种情况,需用惰性材料将层面覆盖起来
expl.
double load or double charge
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