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Application filed by Friedhelm Marten, Gerhard Schindler, Lutz Scherbarth, Friedrich Fay, Egon Vilbrandt, Rudolf Weller, Guenter KruegerfiledCriticalFriedhelm Marten
Priority to DD19770877ApriorityCriticalpatent/DD129993A1/de
Publication of DD129993A1publicationCriticalpatent/DD129993A1/de