WU Jian,ZHANG Yong.Study on the basic theory of longwall top-coal caving system[J].Journal of China University of Mining &Technology,1998,27(4):332-335.是什么意思_WU Jian,ZHANG Yong.Study on the basic theory of longwall top-coal caving system[J].Journal of China University of Mining &Technology,1998,27(4):332-335.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句