Coal Formed Oil煤成油
coal for oil油改煤
coal liquefied oil煤液化油
coal to oil煤变油
coal liquefaction oil液化油
coal transform oil煤制油
substitute coal for oil以煤代油
coal related oil煤成油
coal derived oil煤制柴油
N(名词) petroleum or a refined product from petroleum, esp kerosene 煤馏油 [美国英语]