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Priority to JP2028376UpriorityCriticalpatent/JPS5731317Y2/ja
Priority to US05/711,155prioritypatent/US4091702A/en
Publication of JPS52112818UpublicationCriticalpatent/JPS52112818U/ja
Application grantedgrantedCritical
Publication of JPS5731317Y2publicationCriticalpatent/JPS5731317Y2/ja