About OCHI T
About Nippon Steel Corp., Hokkaido, JPN
About KOYASU Y
About Nippon Steel Corp., Hokkaido, JPN
About Mechanical Working and Steel Processing
About low alloy steel
About Transformation structures,work structures
About Heat treatment technology
About 中炭素鋼
About 焼なまし
About セメンタイト
About 球状化
About 研究