“average grade of mine district”的概念、定义、翻译、参考文献-科学参考

单词	average grade of mine district
释义	average grade of mine district Encyclopedia 工学〔矿产工业指标〕释 average grade of mine district矿区平均品位整个矿床（区）中有用组分的总平均含量。又称矿床平均品位。是从整体上衡量矿床贫富程度的一项参数，也是衡量某些矿床（尤其是矿石品位变化大的）在当前是否值得开发建设和开发后能否获得预期经济效益的一项指标。
随便看	Age Exchange age for criminal responsibility age forming age-friendly city age-friendly community age-friendly environment age groups age hardening age-hardening age heaping age identification of crude drug ageing ageing box ageing drum ageing factor ageing management of main components in reactor coolant system ageing management of nuclear power plant ageing of insulating material ageing of insulation ageing of polymer ageing process ageing society ageing star ageing work ageism

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