英语词汇“fractured roof”的中英文释义、用法、翻译及短语词组-英汉翻译词典

单词	fractured roof
释义	fractured roof 释义破碎顶板行业词典煤炭破碎顶板???又称 :破碎顶板(friable roof)???岩层节理裂隙十分发育、整体强度差、自稳能力低的顶板。???
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fractured roof