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Application filed by 日本鋼管工事株式会社, 明昭株式会社filedCritical日本鋼管工事株式会社
Priority to JP496082UpriorityCriticalpatent/JPS58111294U/ja
Publication of JPS58111294UpublicationCriticalpatent/JPS58111294U/ja
Application grantedgrantedCritical
Publication of JPS624630Y2publicationCriticalpatent/JPS624630Y2/ja