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Priority to JP6370775UpriorityCriticalpatent/JPS558373Y2/ja
Priority to US05/646,049prioritypatent/US4002991A/en
Publication of JPS51144108UpublicationCriticalpatent/JPS51144108U/ja
Application grantedgrantedCritical
Publication of JPS558373Y2publicationCriticalpatent/JPS558373Y2/ja