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Tannic acid - Wikipedia
鞣酸 - 百度百科
鞣质 - 维基百科,自由的百科全书
What Is A Tannin? A Guide To Tannins | Wine 101 - VinePair
Tannin - Wikipedia
Tannic Definition & Meaning - Merriam-Webster
鞣酸 - 维基百科,自由的百科全书
Tannins – What are they and what do they do? - Decanter.com
Review on tannins: Extraction processes, applications and possibilities
单宁酸 CAS#: 1401-55-4 - ChemicalBook