About KATAYAMA SEIJI
About 大阪大 接合科研
About レーザー研究
About laser welding
About brazing
About steel product
About copper base alloy
About aluminum base alloy
About plastic
About titanium
About different metal welding
About dissimilar material joining
About plastic material
About brazing
About steel material
About Welding techniques
About Brazing
About Machining and finishing in general
About 異種材料
About レーザー接合