The Energy Department said this week that petroleum demand has grown for four straight weeks, resulting in unexpected drops in the nation's oil and gasoline supplies last week.
美国能源部称石油需求已连续4周保持增长态势，而预见不足导致上周整个国家的石油供应没有跟上。
2
Through the test and comparison of ethylene cracking of hydrogenated delayed coking gasoline and regular grade straight-run gasoline, it is showed that the former can be used as ethylene stock.
通过对延迟焦化汽油加氢后与普通直馏汽油的乙烯裂解试验和比较，延迟焦化汽油加氢后可以作乙烯原料。
3
The utility model relates to a coke-burning device for regenerating the non-hydrogenation upgrading catalyst for straight-run gasoline.