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primary charge
el. 初次充电
expl. 起爆装药; 起爆药包; 雷管装药; 主炸药
space 始发装药 (在刺激作用下首先发生爆轰或燃烧的装药)
primary charge
: 4 phrases in 2 subjects
Explosives and Explosive Ordnance Disposal2
Space2