“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	parallel connection parallel connection of capacitors parallel connection of resistance parallel contracting parallel coordinate parallel coordinates parallel coordinates in plane parallel coordinates in space parallel coordinate system parallel coordinate system in plane parallel coordinate system in space parallel corpora parallel corpus parallel-cousin marriage parallel curves parallel database parallel debugging parallel definition parallel differential form parallel displacement parallel displacement of curve parallel distributed processing parallel drift parallel drifting bands parallel drifting zebras

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