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Keyword [Urea aldehyde]
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1. Study On Structure Regulation And Properties Of Urea Aldehyde Biodegradable Slow And Controlled Release Fertilizer
2. Preparation And Properties Of Humic Acid/Urea Aldehyde Biodegradable Polymer Materials
3. Preparation And Performance Study Of Urea-formaldehyde Biodegradable Controlled-release Materials Modified By Sodium Lignin Sulfonat
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