The yield for ethanol-water system was 75%, and that for isopropanol-water system could reach 80%.
乙醇-水体系收率可达75%，异丙醇-水体系收率可达80%。
Column efficiency of new VST was then studied with ethanol-water system and was compared with that of sieve tray.
在此基础上，又用乙醇-水系统在常压下测定了该塔的塔板效率并与筛板塔进行了对比。
The change rules of four main kinds of ethyl esters in ethanol-water system of different alcoholicity during the storage were studied.
测定了四大乙酯在不同酒精度的乙醇-水体系中随贮存时间的变化情况。
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