interchanging tunnel mining
interchanging tunnel mining
互通隧道开采
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The interchanging tunnel mining method is suggested on bases of careful feasibility study in both technologically and economically. A new method is developed for recovering the large amount of o…
并提出了进路间隔回采方案，从技术和经济两方面作了详尽的可行性分析，为我国大量残留矿资源的回收探索了一条新路。
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