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 flotation煤浮选,浮游选煤
coal purolysis煤的热分解
coaled vesicle有被小泡
coal-breakern.碎煤机
coal formation煤生成
coal selecting选煤
coal resourcej煤炭资源
coal stockpile盘煤
coaly mudstone煤系泥岩
coal pollution煤炭污染