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Application filed by 永代鋼業株式会社filedCritical永代鋼業株式会社
Priority to JP1979079805UpriorityCriticalpatent/JPS5829697Y2/ja
Publication of JPS55180858UpublicationCriticalpatent/JPS55180858U/ja
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Publication of JPS5829697Y2publicationCriticalpatent/JPS5829697Y2/ja