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Application filed by Helmut Schwenke, Peter Herrmann, Guenther WinklerfiledCriticalHelmut Schwenke
Priority to DD19364076ApriorityCriticalpatent/DD126185B1/de
Publication of DD126185A1publicationCriticalpatent/DD126185A1/xx
Publication of DD126185B1publicationCriticalpatent/DD126185B1/de