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Priority to JP1978170367UpriorityCriticalpatent/JPS6221937Y2/ja
Priority to US06/060,474prioritypatent/US4293842A/en
Publication of JPS5588111UpublicationCriticalpatent/JPS5588111U/ja
Application grantedgrantedCritical
Publication of JPS6221937Y2publicationCriticalpatent/JPS6221937Y2/ja