In the mineable C3 coal seam at Dazhuba coalfield,macroscopic type mainly consist of semi-bright fine coal,secondarily semi-dull and semi-bright lump coal.是什么意思_In the mineable C3 coal seam at Dazhuba coalfield,macroscopic type mainly consist of semi-bright fine coal,secondarily semi-dull and semi-bright lump coal.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句