Coalla科阿利亚
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coaling-basen.煤站
coal resonrces煤炭资源
coal conveying输煤
coal warehouse煤仓
coal resourees煤炭资源
coalmine waste煤矸石
coal gasitiers煤气化炉
Coal Kaolinite煤系高岭土
coal mine goaf采空区
coal character煤质特征