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Priority to DD19396276ApriorityCriticalpatent/DD126765B1/de
Priority to DE19762645387prioritypatent/DE2645387A1/de
Priority to FR7631693Aprioritypatent/FR2329084A1/fr
Publication of DD126765A1publicationCriticalpatent/DD126765A1/xx
Publication of DD126765B1publicationCriticalpatent/DD126765B1/de