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Priority to JP1975037326UpriorityCriticalpatent/JPS5539689Y2/ja
Priority to US05/666,510prioritypatent/US4009890A/en
Publication of JPS51118408UpublicationCriticalpatent/JPS51118408U/ja
Application grantedgrantedCritical
Publication of JPS5539689Y2publicationCriticalpatent/JPS5539689Y2/ja