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Priority to JP9413980UpriorityCriticalpatent/JPS636793Y2/ja
Priority to US06/272,029prioritypatent/US4351222A/en
Publication of JPS5719995UpublicationCriticalpatent/JPS5719995U/ja
Application grantedgrantedCritical
Publication of JPS636793Y2publicationCriticalpatent/JPS636793Y2/ja