Coaltern.科尔特
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
Coal - cutting machine采煤机
coal-mining enterprise煤炭采掘业
coal preparation machine选煤机械
coal-deposit valuation煤层评价
coal mine collapse basin煤矿塌陷区
coal combustion catalyst燃煤催化剂
coal-transporting line运煤专线
coal ultra-fine powder超细煤粉
coalbed methane resource煤层气资源
coal measures sourcerock煤系烃源岩