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Yoshio Muto
The Research Institute for Iron, Steel and Other Metals, Tohoku University
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Yoshio Tawara
The Research Institute for Iron, Steel and Other Metals, Tohoku University
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Yoshio Shibuya
The Research Institute for Iron, Steel and Other Metals, Tohoku University
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Tadao Fukuroi
The Research Institute for Iron, Steel and Other Metals, Tohoku University