versus 有减去这个意思吗? versus在这儿的意思是: ■as opposed to; in contrast to. 与…相对;与…相比 这里的controlled是和前文中相对的,因此我想下文中的the back pressure应该是省略了controlled一词, the back pressure needs to be absolute pressure controlled versus gauge pressure controlled to ensure analysis results are not affected by changes in barometric pressure. 译为:(这里控制的)背压应该为控制绝对压力,而不是控制表压,以确保分析结果不受大气压力变化的影响。查看更多
LNG标准? bs7777 flat-bottomed, vertical, cylindrical storage tanks for low temperature service (中文名)低温工作条件下的立式平底圆筒形储罐 http:///read.php?tid=133434 (里面是中文版的)查看更多
委瑞内拉超重油渣油延迟焦化技术? 重油。尤其是特别重的油,想要深加工,就只能通过延迟焦化来加工,渣油加氢或者其他工艺根本就不能好好的解 ... agreed on coking is much tougher than h2 addition processes. furthermore, flexicoking can deal with harder feed than delayed coking查看更多