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Priority claimed from JP2112873Uexternal-prioritypatent/JPS5244567Y2/ja
Priority claimed from JP2216973Uexternal-prioritypatent/JPS5244568Y2/ja
Application filed by Nippon Steel CorpfiledCriticalNippon Steel Corp
Publication of BR7401260D0publicationCriticalpatent/BR7401260D0/en