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Priority to JP1973070447UpriorityCriticalpatent/JPS5552477Y2/ja
Priority to US461417Aprioritypatent/US3902396A/en
Priority to GB1722874Aprioritypatent/GB1456604A/en
Publication of JPS5018224UpublicationCriticalpatent/JPS5018224U/ja
Application grantedgrantedCritical
Publication of JPS5552477Y2publicationCriticalpatent/JPS5552477Y2/ja