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Application filed by Martin Floessel, Bernd Helmerich, Achim Rohse, Helmuth Seiffahrt, Stollberg Karl ErnstfiledCriticalMartin Floessel
Priority to DD20673578ApriorityCriticalpatent/DD137854A1/de
Publication of DD137854A1publicationCriticalpatent/DD137854A1/de