Coalla科阿利亚
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal screening煤的筛选
coal mine dust煤矿粉尘
coal petrology煤岩学,煤岩石学
coal reburning煤粉再燃
coal ploughing刨煤机回采
coal-tar gas煤焦油煤气
Coal mining.采煤
Coal Hill Park
coalenterazine腔肠素
coal-tar oil煤焦油