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Application filedfiledCritical
Priority to DD17688474ApriorityCriticalpatent/DD110717A1/xx
Publication of DD110717A1publicationCriticalpatent/DD110717A1/xx
Priority to DE19752506340prioritypatent/DE2506340A1/de
Priority to HUKE000962prioritypatent/HU169558B/hu
Priority to FR7506398Aprioritypatent/FR2262856A1/fr