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*Futoshi Himi
Joinig and Welding Research Institute Osaka Unibersity
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Yousuke kawahito
Joinig and Welding Research Institute Osaka Unibersity
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Masami Mizutani
Joinig and Welding Research Institute Osaka Unibersity
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Katsuyoshi Kondoh
Joinig and Welding Research Institute Osaka Unibersity
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Seiji katayama
Joinig and Welding Research Institute Osaka Unibersity