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Priority to JP1979157701UpriorityCriticalpatent/JPS5835571Y2/ja
Priority to IT8068729Aprioritypatent/IT1129841B/it
Publication of JPS5673968UpublicationCriticalpatent/JPS5673968U/ja
Application grantedgrantedCritical
Publication of JPS5835571Y2publicationCriticalpatent/JPS5835571Y2/ja