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Priority to JP1980050325UpriorityCriticalpatent/JPS6138399Y2/ja
Priority to US06/251,824prioritypatent/US4386298A/en
Publication of JPS56152591UpublicationCriticalpatent/JPS56152591U/ja
Application grantedgrantedCritical
Publication of JPS6138399Y2publicationCriticalpatent/JPS6138399Y2/ja