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底部炮孔
expl. slab hole; snakehole; bottom hole
底部炮孔巷道〈隧道〉开挖炮孔组中沿底板布置的朝上破碎的炮孔
expl. lifters
底部 炮 孔
: 14 phrases in 1 subject
Explosives and Explosive Ordnance Disposal14