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*Yoshihisa Sechi
Kagoshima Prefectural Institute of Industrial Technology
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Kimiaki Nagatsuka
Joining and Welding Research Institute, Osaka University
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Takahiro Fujimoto
Graduate Student, Graduate School of Engineering, Osaka University
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Masahiro Tsukamoto
Joining and Welding Research Institute, Osaka University
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Kazuhiro Nakata
Joining and Welding Research Institute, Osaka University