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Toshimitsu MATSUI
Kokura Steel Works, Sumitomo Metal Industries, Ltd.
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Yoshisuke MISAKA
Central Research Laboratories, Sumitomo Metal Industries, Ltd.
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Shunji OGATA
Kokura Steel Works, Sumitomo Metal Industries, Ltd.
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Motoho ASAKAWA
Kokura Laboratory, Central Research Laboratories, Sumitomo Metal Industries,Ltd.
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Katsuya KONDO
Central Research Laboratories,Sumitomo Metal Industries,Ltd.