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Application filed by Gerhard Franck, Horst Haeuser, Ralfhartmut GeyerfiledCriticalGerhard Franck
Priority to DD19959977ApriorityCriticalpatent/DD131622B1/de
Publication of DD131622A1publicationCriticalpatent/DD131622A1/de
Publication of DD131622B1publicationCriticalpatent/DD131622B1/de