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Priority to JP11837875UpriorityCriticalpatent/JPS541873Y2/ja
Priority to US05/713,874prioritypatent/US4169549A/en
Publication of JPS5232527UpublicationCriticalpatent/JPS5232527U/ja
Application grantedgrantedCritical
Publication of JPS541873Y2publicationCriticalpatent/JPS541873Y2/ja