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Priority to JP1980102610UpriorityCriticalpatent/JPS5814521Y2/ja
Priority to US06/261,130prioritypatent/US4472658A/en
Publication of JPS5725454UpublicationCriticalpatent/JPS5725454U/ja
Application grantedgrantedCritical
Publication of JPS5814521Y2publicationCriticalpatent/JPS5814521Y2/ja