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Priority to JP1975122885UpriorityCriticalpatent/JPS5555627Y2/ja
Priority to GB36863/76Aprioritypatent/GB1515056A/en
Priority to US05/721,374prioritypatent/US4307672A/en
Publication of JPS5236618UpublicationCriticalpatent/JPS5236618U/ja
Application grantedgrantedCritical
Publication of JPS5555627Y2publicationCriticalpatent/JPS5555627Y2/ja