英语语法分析

The average residence time of oil gases in the disengager is also shortened by adding an unique device for gas withdrawl.

采用特殊设计的气体引出方式，大大缩短了油气在沉降器内的平均停留时间。

The microstructure and composition of coke from different parts of the FCCU disengager were analyzed by using both scanning-electron microscope(SEM) and X-ray analysis(EDS) methods.

采用扫描电镜（SEM）和X射线能谱分析仪对催化裂化装置（FCCU）沉降器内结焦物的微观组织结构和成分进行了分析，将结焦物划分为软焦和硬焦。