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polyvinyl butyral
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polyvinyl butyral
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聚乙烯醇缩丁醛
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polyvinyl butyral
聚乙烯醇缩丁醛
聚乙烯醇与丁醛的缩合物。
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polyvinyl butyral
聚乙烯醇缩丁醛
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