About KOBAYASHI MITSUO
About ONO TAKASHI
About GOTO YOSHIKI
About FUNAYAMA YOSHIHIRO
About 東京都産業技研
About NIWA NAOTAKE
About HONGO KAORU
About 材料試験技術
About microhardness
About plasma carburizing
About Fasteners,clamping,relaxation,joints
About Surface hardening
About Material testing
About Ti
About ボルト
About 締付け
About プラズマ浸炭