The high temperature nitrogen dehydration method is to synthesize the certain molecular weight polyester polyol under the protection of nitrogen at high temperature.
高温氮气脱水法是在氮气保护下，高温合成聚酯多元醇。
The high temperature nitrogen dehydration method is to synthesize the certain molecular weight polyester polyol under the protection of nitrogen at high temperature.
高温氮气脱水法是在氮气保护下，高温合成聚酯多元醇。
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