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Priority to JP6962775UpriorityCriticalpatent/JPS5424018Y2/ja
Priority to US05/666,510prioritypatent/US4009890A/en
Publication of JPS51149002UpublicationCriticalpatent/JPS51149002U/ja
Application grantedgrantedCritical
Publication of JPS5424018Y2publicationCriticalpatent/JPS5424018Y2/ja