coallessadj.无煤的
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
Coal-bed methane exploration煤层气勘探
coal - transfer - trestles输煤栈桥
coal-worker's pnuemoconiosis氯氮平
coal-accumulating regulation聚煤规律
coal mining while gas drainage边采边抽
coal mining machine middle box采煤机中间箱
coal mining areas of Mentougou门头沟煤矿区
coal in the automobile vehicle汽车煤