trivalent and hexavalent chromium
trivalent and hexavalent chromium
三价和六价铬
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Trivalent chromium and hexavalent chromium are two main states of the chromium in foods.
三价铬及六价铬是食品中微量元素铬的两种主要存在价态。
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Galvanized to trivalent chromium and hexavalent chromium passivation passivation process.
镀锌为三价铬钝化及六价铬钝化工艺。
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