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*Masaru SAKAMURA
Hiroshima Prefectural Technology Research Institute
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Kaoru OHISHI
Hiroshima Prefectural Technology Research Institute
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Yoshihiro TAKEYASU
Hiroshima Prefectural Technology Research Institute
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Takuya TSUMURA
Joining and Welding Research Institute Osaka University
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Kazuhiro NAKATA
Joining and Welding Research Institute Osaka University