coalgasn.煤气coaln.煤；木炭vt.烧成炭；供应煤vi.加煤；装煤coal smoke meter煤烟浓度计coal-generatedadj.煤发电coal mining area煤矿区coal refuse hill矸石山coal fluid drill煤液钻coal - bed gas煤层气coal enterprises煤炭企业coal mine tunnel煤矿巷道coal mine system煤矿系统coal concentrate[化] 洗煤

1. Coal seams intermixed with iron ore.
   煤层和铁矿混杂在一起。
2. Several coal beds are developed in backswamp deposits.
   河漫沼泽上发育多套煤层。