About HASHIMOTO MUNETO
About 住友重機械工業
About YAMAMOTO AKIRA
About 住友重機械工業
About TANAKA KAZUHIRO
About 住友重機械工業
About ショットピーニング技術
About carburizing (heat treatment)
About pitting
About Hardening not due to thermal operation
About Surface hardening
About Gears,gear units
About 浸炭
About 歯車
About ショットピーニング
About ピッチング
About 寿命