A new type self-walking advance timbering support set is adopted in longwall coal mining face of Halagou Coal Mine,Shendong Coal District by Shenhua Group Co.是什么意思_A new type self-walking advance timbering support set is adopted in longwall coal mining face of Halagou Coal Mine,Shendong Coal District by Shenhua Group Co.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句