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Priority to JP1976031540UpriorityCriticalpatent/JPS5623924Y2/ja
Priority to US05/777,703prioritypatent/US4123781A/en
Publication of JPS52122336UpublicationCriticalpatent/JPS52122336U/ja
Application grantedgrantedCritical
Publication of JPS5623924Y2publicationCriticalpatent/JPS5623924Y2/ja