The EGD wind cooling two stroke gasoline engine oil are formulated with base oil (Ⅱ),kerosene without peculiar smell and low molecula PIB,as well as many kinds of domestic additives.

Methods The product quality of the part of Ⅱ,Ⅲ category of medical device manufacturers was researched,the existing problems and reasons were analyzed,and the corresponding measures were put forward.

by taking an example of project,the article discussed several base models.

By taking the example of the building of the College Library,the article analyses the choice of base-model and puts forward the theory for the choice of the base model.