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Yukio MIYASHITA
Nagaoka University of Technology
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Kazuya SATOH
Nagaoka National College of Technology
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Motojiro SUGISAWA
Nagaoka National College of Technology
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Katsuyoshi KONDOH
Joining and Welding Research Institute Osaka University
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Yoshiyuki SHIMOTSUYA
Nagaoka University of Technology
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Yoshiharu MUTOH
Nagaoka University of Technology