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process for the manufacture of a ferrous,permanent magnetisable material during co precipitation of iron oxide in the form of iron (iii) oxide and a divalent metal from an aqueous solution thereof at a in solution suspended carrier.
process for the manufacture of a ferrous,permanent magnetisable material during co precipitation of iron oxide in the form of iron (iii) oxide and a divalent metal from an aqueous solution thereof at a in solution suspended carrier.