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Application filedfiledCritical
Priority to DD15957971ApriorityCriticalpatent/DD101375A1/xx
Priority to GB5721672Aprioritypatent/GB1411597A/en
Priority to FR7244196Aprioritypatent/FR2209727B1/fr
Priority to DE19722260879prioritypatent/DE2260879B2/de
Publication of DD101375A1publicationCriticalpatent/DD101375A1/xx