coallessadj.无煤的
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
Coal mine reserves management煤矿储量管理
coal resources related cities煤炭资源型城市
coal mining safety production煤矿安全生产
coal or rock dynamic disaster煤岩动力灾害
coal mine's acidic wastewater克洛切安
coal resources - typed city煤炭资源型城市
coalescence of water droplets水滴聚合
coal mine security management煤矿安全管理