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Priority to JP1976153867UpriorityCriticalpatent/JPS5649579Y2/ja
Priority to GB46771/77Aprioritypatent/GB1556961A/en
Priority to US05/852,749prioritypatent/US4161153A/en
Publication of JPS5373156UpublicationCriticalpatent/JPS5373156U/ja
Application grantedgrantedCritical
Publication of JPS5649579Y2publicationCriticalpatent/JPS5649579Y2/ja