以二甲基亚砜为萃取溶剂,用溶剂萃取的方法提高焦化柴油的颜色安定性.Colour stability of coker gas oil has been improved by DMF extraction.以物质A为反应物,白土为脱色物质,研究用反应-吸附的方法提高焦化柴油的质量.A coking gas oil was treated by clay refining processs in laboratory.在这道门里, 焦化和...
Hanover was incorporated into Prussia in 1886.汉诺威市于1886年并入普鲁士.We were turned off the train at Hanover, where we had to change.我们在汉诺威站被赶下火车，只好在那儿转车。After two or three attempts , he lifted himself into the saddle and start...