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Priority to JP15622175UpriorityCriticalpatent/JPS552457Y2/ja
Priority to US05/722,398prioritypatent/US4130044A/en
Publication of JPS5269223UpublicationCriticalpatent/JPS5269223U/ja
Application grantedgrantedCritical
Publication of JPS552457Y2publicationCriticalpatent/JPS552457Y2/ja