STUDY ON PACKING BODY SUPPORTING RESISTANCE OF ENTER-IN PACKING FOR IN-SITU GOB-SIDE ENTRY RETAINING IN FULLY- MECHANIZED TOP-COAL CAVING MINING FACE是什么意思_STUDY ON PACKING BODY SUPPORTING RESISTANCE OF ENTER-IN PACKING FOR IN-SITU GOB-SIDE ENTRY RETAINING IN FULLY- MECHANIZED TOP-COAL CAVING MINING FACE在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句