Process of preparation of red dyes of the type of the anthocyanins, from sweet potato Ipomoea batatas, lam.convolulacear, ver.porphyrorhiza, purple flesh

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  机译： 制作紫色甜薯粉的过程

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  机译： 制作紫色甜薯粉的过程

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  机译： 生产紫色甜马铃薯醋的方法

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