About YOSHIDA HAJIME
About SAKAIDA YOSHIHISA
About SAWAKI YOZO
About 元静岡大学
About NAKAMURA TAMOTSU
About HAYAKAWA KUNIO
About ISOGAI AKIRA
About cold extrusion
About spur gear
About shaping
About mandrel
About formability
About extruding dies
About helical gear
About Extrusion
About 内径
About 拡張
About 外歯車
About 押出し成形