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Explosives and Explosive Ordnance Disposal
containing
成本单
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在爆破设计时选择最佳单位炸药消耗量,既能消除经济成本方面的顾虑,又能消除环境方面的顾虑
An optimum powder factor can satisfy both economic and environmental considerations in blast design
平均单价、平均单位成本
average unit cost
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