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Application filed by 社団法人日本鉄鋼連盟filedCritical社団法人日本鉄鋼連盟
Priority to JP2062582UpriorityCriticalpatent/JPS58124446U/ja
Publication of JPS58124446UpublicationCriticalpatent/JPS58124446U/ja
Application grantedgrantedCritical
Publication of JPS6239066Y2publicationCriticalpatent/JPS6239066Y2/ja