About TAKAHASHI YUZO
About 新日本製鐵(株)大分技術研究部
About HORIOKA SATOSHI
About (株)N・TEC大分
About KAWANO OSAMU
About 新日本製鐵(株)大分技術研究部
About OHARA MASAHIRO
About (株)日鐵テクノリサーチ
About USHIODA KOSAKU
About 新日本製鐵(株)技術開発本部
About punch
About blanking
About steel plate
About flanging
About work hardening
About punch
About high strength steel plate
About hole expansion
About Special forming
About Mechanical properties
About 突起
About パンチ
About 張力
About 打抜き
About 高強度
About 薄鋼板
About 穴広げ