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Priority to JP1973038583UpriorityCriticalpatent/JPS5326494Y2/ja
Priority to US452360Aprioritypatent/US3911889A/en
Priority to DE2415465Aprioritypatent/DE2415465A1/de
Publication of JPS49138235UpublicationCriticalpatent/JPS49138235U/ja
Application grantedgrantedCritical
Publication of JPS5326494Y2publicationCriticalpatent/JPS5326494Y2/ja