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Priority to JP1977150806UpriorityCriticalpatent/JPS5639022Y2/ja
Priority to US05/905,189prioritypatent/US4167231A/en
Publication of JPS5476846UpublicationCriticalpatent/JPS5476846U/ja
Application grantedgrantedCritical
Publication of JPS5639022Y2publicationCriticalpatent/JPS5639022Y2/ja