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Priority to JP10402676UpriorityCriticalpatent/JPS5714697Y2/ja
Priority to GB36863/76Aprioritypatent/GB1515056A/en
Priority to US05/721,374prioritypatent/US4307672A/en
Publication of JPS5323420UpublicationCriticalpatent/JPS5323420U/ja
Application grantedgrantedCritical
Publication of JPS5714697Y2publicationCriticalpatent/JPS5714697Y2/ja