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Priority to JP1980094138UpriorityCriticalpatent/JPS6326853Y2/ja
Priority to US06/272,029prioritypatent/US4351222A/en
Publication of JPS5719988UpublicationCriticalpatent/JPS5719988U/ja
Application grantedgrantedCritical
Publication of JPS6326853Y2publicationCriticalpatent/JPS6326853Y2/ja