About KOGA FUMIO
About 古賀
About NINOMIYA SHIN'ICHI
About lathe turning
About cutting tool
About carbide tool
About multi-spindle machine tool
About tool wear
About hardened steel
About metal round bar
About rotating tool
About Turning,boring
About 未来
About 丸棒
About 焼入れ鋼
About スピン
About ターニング