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Priority to JP1972106424UpriorityCriticalpatent/JPS548289Y2/ja
Priority to IT1919273Aprioritypatent/IT978141B/it
Publication of JPS4960169UpublicationCriticalpatent/JPS4960169U/ja
Application grantedgrantedCritical
Publication of JPS548289Y2publicationCriticalpatent/JPS548289Y2/ja