About IKENAGA AKIRA
About GOTO YOSHIYUKI
About NITTA YASUHIRO
About KAWAMOTO MAKOTO
About KOBAYASHI KOJIRO
About ARAKI HIROJI
About nodular graphite cast iron
About void
About Powder compacting,sintering
About Other surface treatment
About 球状黒鉛
About 鉄基
About Ni
About Al
About 金属間化合物
About 被覆層
About ち密化