两级干燥工艺
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two-grade drying process
二级干燥工艺
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The existing problems of traditional PVA drying were analyzed, the paddle two-grade drying process for PVA and its applications were presented.
分析了传统聚乙烯醇干燥工艺存在的问题，介绍了聚乙烯醇桨叶两级干燥工艺和应用情况。
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