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Priority to JP1955572UpriorityCriticalpatent/JPS5131638Y2/ja
Priority to US00327777Aprioritypatent/US3816774A/en
Publication of JPS4896943UpublicationCriticalpatent/JPS4896943U/ja
Application grantedgrantedCritical
Publication of JPS5131638Y2publicationCriticalpatent/JPS5131638Y2/ja