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Alum Sulphate Grinding Machine

Alum - definition of alum by the free dictionary.1.Elements compounds also called potash alum a colourless soluble hydrated double sulphate of aluminium and potassium used in the manufacture of mordants and pigments, in dressing leather and sizing paper, and in medicine as a styptic and astringent.

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Zhengzhou High-tech Zone, China

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