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特殊鋼業者炉別製鋼能力調
Special Materials [Resources and Historical Collections Office]
衝撃電圧ニ関スル研究並ニ電弧ノ特性ニ関スル研究
Source materials for Engineering History: The University of Tokyo Digital Archive
実習報告 於(日立製作所助川工場 京成電気軌道株式会社)
Source materials for Engineering History: The University of Tokyo Digital Archive