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Explosives and Explosive Ordnance Disposal
containing
单 式
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单体炮孔布置形式
炮孔布置形式,依被爆体的形状、位置和结构特征而具体确定,一般使用垂直孔或水平孔〈应首先考虑使用垂直孔〉
hole pattern of building infrastructure blasting demolition
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