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Application filed by Eberhard Zillgith, Erwin TeichertfiledCriticalEberhard Zillgith
Priority to DD19641876ApriorityCriticalpatent/DD128752B1/de
Publication of DD128752A1publicationCriticalpatent/DD128752A1/de
Publication of DD128752B1publicationCriticalpatent/DD128752B1/de