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Kazuo SUGINO
Tokyo Research Institute, Yawata lron & Steel Co., Ltd.
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Katsuyoshi MIYAMOTO
Tokyo Research Institute, Yawata lron & Steel Co., Ltd.
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Michihiko NAGUMO
Tokyo Research Institute, Yawata lron & Steel Co., Ltd.
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Kōichi AOKI
Tokyo Research Institute, Yawata lron & Steel Co., Ltd.