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Hiroki Okubo
Ehime University
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Tatsuaki Sakamoto
Faculty of Engineering, Ehime University
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Sengo Kobayashi
Faculty of Engineering, Ehime University
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Kiyomichi Nakai
Faculty of Engineering, Ehime University
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Masahiko Hamada
Corporate R & D Laboratories, Sumitomo Metal Industries, Ltd.
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Yu-ichi Komizo
Joining and Welding Research Institute, Osaka University