coalpitn.煤坑;炭灶
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal/gangue proportion煤矸配比
coalification electricity煤-化-电
coal- burning pollution煤烟型污染
coal-oil-water slurry三元煤浆
Coal-firing power plant燃煤电厂
coalbed methane potential煤层气资源潜力
coal transport by railway铁路煤运
Coalmining-based cities煤炭城市
coal mine safety training煤矿安全培训
coal- mining enterprise煤炭企业