Colour stability of coker gas oil has been improved by DMF extraction.以二甲基亞砜為萃取溶劑,用溶劑萃取的方法提高焦化柴油的顏色安定性.The coker gas oil was refined by benzyl alcohol extraction.以芐醇為溶劑,用萃取方法提高了焦化柴油的質量.Tell Colonel Coker, I am investigat...
Such cuestas may be either erosional escarpments or fault scarps.這類單面山既可以是侵蝕山崖也可以是斷層崖.The escarpments are sustained by rock.這些垅崗由巖石構成.Danxia landform is the continental red bed landform with escarpments.丹霞地貌是指有陡崖的陸相紅層地貌....