短语词组短语Coking benzole 焦化苯light benzole [有化]轻苯benzole separation 粗苯回收heavy benzole [有化]重苯motor benzole 动力苯benzole plant 苯回收工段Benzole acid 苯甲酸benzole stripping 脱苯benzole forerunning 苯初馏 返回 benzole