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Priority to JP1447981UpriorityCriticalpatent/JPS6143089Y2/ja
Priority to US06/255,001prioritypatent/US4413612A/en
Publication of JPS57127159UpublicationCriticalpatent/JPS57127159U/ja
Application grantedgrantedCritical
Publication of JPS6143089Y2publicationCriticalpatent/JPS6143089Y2/ja