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process for the production of permanentmagnetischem material after patent no. 24 49 361, and the material of the rare earth cerium, lanthanum, neodymium, praseodymium, samarium and cobalt and possibly contains
process for the production of permanentmagnetischem material after patent no. 24 49 361, and the material of the rare earth cerium, lanthanum, neodymium, praseodymium, samarium and cobalt and possibly contains