coalboxn.煤箱;发黑烟的炸弹
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coalbed injection煤层注水
Coal mine methane煤层气
coal gangue stone煤矸石
Coal mine in town乡镇煤矿
coal accumulation聚煤作用
coal gangue brick矸石砖
coalcutter loader联合采煤机
coal dropping bed落煤床
coal slurry water煤泥水
coal fried boiler燃煤锅炉