wall rock stability classification
wall rock stability classification
围岩稳定性分级
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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With the object of wall rock in mining roadway, its stability classification and support technology are studied in detail.
本文以回采巷道围岩为研究对象，对其稳定性分类及其支护对策进行了深入细致的研究。
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