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编辑同志: 《金属矿山》1978年第5期、1979年第4期先后发表过有关探讨贫化率计算方法的文章,有的作者认为,无论围岩有无品位均应采用下面计算贫化率的公式:
Editorial comrades: “Metal Mines” 1978 the fifth period, in 1979 fourth issue has published on the calculation of depletion rate article, some authors believe that no matter the surrounding rock with or without grade should be used to calculate the rate of dilution Formula: