3.Nitrodiphenylamine is synthesiized by direct condensing method,adsopting aniline and 2-nitrochlorobenzene as feeds,PEG as phase transfer catalyst.
以苯胺、基氯苯为原料,采用直接缩合法引入相转移催化剂合基二苯胺。
4.The condensing cleaners of Solvay refrigerator cryopump developed at SWIP are presented,and the modified Solvay two stages expander and the design and the features of the cryopump are also introduced.
介绍自己研制的索尔文制机低温泵的压缩净化机组、改进型索尔文两级膨胀机以及低温泵体的设计及特点。
5.We study problems of random fixed points of random semiclosed 1-set-contracive operator and random condensing operator, and generalize serveral theorems of Guo dajun.