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Priority claimed from DE3725505Aexternal-prioritypatent/DE3725505C1/de
Application filed by Frenzelit Werke Gmbh & Co KgfiledCriticalFrenzelit Werke Gmbh & Co Kg
Publication of NO891357D0publicationCriticalpatent/NO891357D0/en
Publication of NO891357LpublicationCriticalpatent/NO891357L/en