coalbedn.煤层
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal-mine worker煤矿工人
coal-fired plant燃煤电厂
coal carbonization煤的碳化,煤的干馏
coal wall spailing煤壁片帮
coal caving mining放顶煤
coal seam contrast曲线对比
coal waste residue煤矸石
coal and coal char煤与煤焦
coal slurry system煤泥水系统
coal - rich zone富煤带