About EGAMI NOBORU
About KAGAYA CHUJI
About FUJII KENJI
About 藤井工業
About TAKESHITA HIROAKI
About 大同特殊鋼
About AMANO SATOSHI
About 天野研磨工業所
About fine particle
About fatigue crack
About Hardening not due to thermal operation
About Surface hardening
About 微粒子ピーニング
About SCM415
About 浸炭窒化
About 改質効果