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Priority to JP1976135502UpriorityCriticalpatent/JPS5555223Y2/ja
Priority to US05/839,185prioritypatent/US4131953A/en
Publication of JPS5354215UpublicationCriticalpatent/JPS5354215U/ja
Application grantedgrantedCritical
Publication of JPS5555223Y2publicationCriticalpatent/JPS5555223Y2/ja