短語(yǔ)詞組短語(yǔ)developing of abscission layer 離層發(fā)育abscission layer critical value 離層臨界值roof abscission layer 頂板離層abscission layer grouting 離層注漿abscission layer destroy 離層破壞grouting into abscission layer 離層注漿roadway abscission layer 巷道離層abscission layer indicating instrument 離層指示儀Roof Abscission Layer and Monitor 頂板離層與監(jiān)測(cè) 返回 abscission layer