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高速度工具鋼 高品質へのあくなき探求 - BÖHLER Japan · 2019. 10. 22. · 粉末鋼のミクロ組織 4 3種類の品質 - 3種類の技術 粉末鋼 esr鋼 (エレクトロスラグ再溶解鋼)通常の溶製法
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