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*Daisuke Sakai
Kagawa National College of Technology (Present Adress : Osaka University)
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Shinichiro Shobako
Kagawa National College of Technology
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Yoshikazu Suita
Kagawa National College of Technology
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Noboru Terajima
Kagawa National College of Technology
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Manabu Tanaka
Joining and Welding Research Institude Osaka University