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Explosives and Explosive Ordnance Disposal
containing
垂面
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梯段垂直面的顶边
rim
梯段垂直面的顶边
belt crest
爆破喷泄的气体渗人与炮孔轴线垂直的裂缝面、将岩石破碎后抛向空中
G-venting from the blast penetrates the fracture planes perpendicular to the hole axis and breaks the rocks up and propels them up to the air
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