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Priority to JP9703876UpriorityCriticalpatent/JPS5416698Y2/ja
Priority to US05/813,418prioritypatent/US4131779A/en
Publication of JPS5317846UpublicationCriticalpatent/JPS5317846U/ja
Application grantedgrantedCritical
Publication of JPS5416698Y2publicationCriticalpatent/JPS5416698Y2/ja