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bull hole
expl. 空孔平行掏槽孔中不装药的中心孔〈属直眼掏槽类〉
bulled hole
gen. 药壶; 药室
expl. 药壶炮孔; 扩底炮孔
bull hole
: 3 phrases in 2 subjects
Drilling1
Explosives and Explosive Ordnance Disposal2