Second, some of volatile aldehydes with low boiling point of hazardous substances to reduce the harmful ingredients. 二是可挥发掉一些沸点低的醛类有害物质,减少有害成分。
Group U2 was of low selectivity and high solvency. The second step is: selecting one solvent apiece from each group to make up of a mixed solvent system; screening the mixed solvent according to selectivity, boiling point and solvency. 第二步:分别在U1和U2中选择一个溶剂,排列组合,根据混合溶剂的选择性、溶解性和泡点筛选出最优的溶剂。
The second part, mainly discusses the "boiling point" and "seventeenyears" industrial novels experienced in writing the inheritance relationship. 第二部分,主要论述了《沸腾的群山》与十七年工业题材小说在写作经验上的承继关系。