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2013-05-23 12:21
求翻译：management method (all collapse). The comprehensive hardness of overlying strata is medium hard, which reflect the characteristic of coal seam overburden rocks covered with thick aeolian sand loose bed. The loose bed of surface aeolian sand has no non-deformability and exerts gravitation to the bed rocks covering above是什么意思？ 待解决
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- 离问题结束还有
management method (all collapse). The comprehensive hardness of overlying strata is medium hard, which reflect the characteristic of coal seam overburden rocks covered with thick aeolian sand loose bed. The loose bed of surface aeolian sand has no non-deformability and exerts gravitation to the bed rocks covering above
问题补充： |
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