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2. The concentration of mono -, bi-color and related ferrites (alcohols: methanol, ethyl, propyl and other organic liquids) which are insoluble in water or hydrogen alcohol environment is different, including alkaline and alkaline elements;
2. The concentration of mono -, bi-color and related ferrites (alcohols: methanol, ethyl, propyl and other organic liquids) which are insoluble in water or hydrogen alcohol environment is different, including alkaline and alkaline elements;