Coalen.科尔
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal grading煤的分级,煤分级
coal chafing装煤
coal and oil煤炭与石油
coal leaking漏煤
Coal and Gas煤与瓦斯突出
coal tae dye[机] 煤焦液化
coal briquet煤饼
coal puncher冲击式截煤机
coal quality煤质
coal looking找煤