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Priority to JP5320076UpriorityCriticalpatent/JPS52145242U/ja
Priority to US05/789,917prioritypatent/US4122914A/en
Priority to FR7713096Aprioritypatent/FR2349730A1/fr
Priority to DE19772719213prioritypatent/DE2719213A1/de
Publication of JPS52145242UpublicationCriticalpatent/JPS52145242U/ja