TESTING STUDY ON DEFORMATION FEATURES OF SURROUNDING ROCKS OF GOB-SIDE ENTRY RETAINING IN FULLY-MECHANIZED COAL FACE WITH TOP-COAL CAVING是什么意思_TESTING STUDY ON DEFORMATION FEATURES OF SURROUNDING ROCKS OF GOB-SIDE ENTRY RETAINING IN FULLY-MECHANIZED COAL FACE WITH TOP-COAL CAVING在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句