coalern.运煤船;运煤铁路;煤商
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal into gas煤成气
coalchemistry煤化工
coal blasting爆破落煤
coal gas well煤层气井
coal flyashes粉煤灰
coal extracts煤萃,煤馏出物
Coal Tar Fuel煤焦油燃料
coal grinding煤研磨
coal agitator翻煤器
coal-saving节煤