coalingn.装煤coaln.煤；木炭vt.烧成炭；供应煤vi.加煤；装煤coal bearing ratio含煤系数coal-based fuels煤基燃料coal pillar mining带煤柱开采coal ash coagulant粉煤灰基混凝剂coalfield drilling煤田钻探coal gas detection燃气检测coal recovery rate煤炭回收率coal water mixture水煤浆coal seam infusion煤层注水Coal mine elevator煤矿提升机