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| 炮孔布置图在一个工作面或台阶上布置，为了爆破需给出炮孔位置的平面图。最小抵抗线和间距应以米表示 | |||
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blast hole pattern : 2 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 2 |
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