... colemanite 硬硼钙石 collapse of roof 顶板崩落 collapse 崩落 ...
基于80个网页-相关网页
... 顶板沉陷：top subsidence 顶板崩落：roof dilapidation 顶板背板：back lath ...
基于8个网页-相关网页
短语
顶板崩落过程
caving process of overlying strata
顶板突然崩落
roof burst
顶板诱导崩落
blast-induced caving roof
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