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正向起爆
expl. toe priming; top initiation
正向起爆炸药装人炮孔后,把起爆药卷放在孔口附近使爆轰从孔口传至孔底的起爆方法，也称孔口起爆或顶端起爆
expl. collar firing; collar priming; direct priming; top initiation; top priming; direct initiation
正向起爆起爆药卷〈包〉靠近炮孔口，雷管底部朝向眼〈孔〉底的起爆方法
expl. direct priming; direct initiation; collar priming

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