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process for chemical cleaning of base with copper and / or zinc contaminated nickelsalzen or nickelsalzloesungen and method for cathodic production of nickelplatten using the purified nickelsalze or nickelsalzloesungen
process for chemical cleaning of base with copper and / or zinc contaminated nickelsalzen or nickelsalzloesungen and method for cathodic production of nickelplatten using the purified nickelsalze or nickelsalzloesungen