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Priority to JP1976016977UpriorityCriticalpatent/JPS5734474Y2/ja
Priority to US05/682,667prioritypatent/US4090350A/en
Publication of JPS52109875UpublicationCriticalpatent/JPS52109875U/ja
Application grantedgrantedCritical
Publication of JPS5734474Y2publicationCriticalpatent/JPS5734474Y2/ja