coallessadj.无煤的coaln.煤；木炭vt.烧成炭；供应煤vi.加煤；装煤coal - transportation trestle输煤栈桥coal conversion to oil projects煤制油项目coal mining upon confined water带压开采coal-derived gas accumulation煤成气成藏coal dressing with heavy medium重介质选煤Coal-miners are a tough breed煤矿工人都是能吃苦耐劳的.coal-tar pitch derived carbon煤沥青炭coal bed spontaneous combustion煤层自燃coal briquette for gasification造气型煤coal conveying transfer station输煤转运站