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The approaches to optimization of mining method for inclined and extra-narrow gold ore vein are described in this article.
本文主要论述了倾斜极薄岩金矿脉采矿方法的优化途径。
youdao
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The approaches to optimization of mining method for inclined and extra-narrow gold ore vein are described in this article.
本文主要论述了倾斜极薄岩金矿脉采矿方法的优化途径。
youdao