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*tetsuya MIYAGAKI
&quat;Joining and Welding Research Institute, Osaka University&quat;
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LIU Huihong
&quat;Joining and Welding Research Institute, Osaka University&quat;
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Kamai Masayoshi
&quat;Joining and Welding Research Institute, Osaka University&quat;
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Fujii Hidetoshi
&quat;Joining and Welding Research Institute, Osaka University&quat;