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炮孔密集系数钻孔间距与钻孔最小抵抗线之比,决定着炸药在岩体中的分布效率。由于炮孔的起爆顺序不同，爆破时炮孔密集系数可能变化很大,参见 spacing [burden] ratio at drilling
expl. concentration coefficient of hole
炮孔密集系数
expl. burden-to-spacing ratio
炮孔密集系 数
: 3 phrases in 1 subject
Explosives and Explosive Ordnance Disposal3

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