英语语法分析

Improvement of synthesis process of methyl isopropenyl ketone was introduced, and the yields in different temperature was compared.

对甲基异丙烯基酮的合成工艺进行了改进，比较了在不同温度下，对醇酮中间体和脱水反应收率的影响。

Isopropenyl and peripheral materials for rollers are used for cleaning and maintenance. Physical parameters of rubber materials are available by phone or correspondence.

用异丙醇和滚轮周边耗材作清洁保养，具体胶料物性参数可以来电来信获取。