“productive ore reserve”的概念、定义、翻译、参考文献-科学参考

单词	productive ore reserve
释义	productive ore reserve Encyclopedia 工学生产矿量释 productive ore reserve生产矿量矿山生产过程中，根据采矿工程的准备程度，计划开采的矿石量所分为的开拓矿量、采准矿量和备采矿量三个级别的的矿量总称。又称三级矿量。露天矿只划分开拓矿量和备采矿量两级。
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