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Arata Suda
Central Research Laboratories, Nihon Parkerizing Co., Ltd.
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Tadashi Shinohara
Department of Metallurgy, Faculty of Engineering, The University of Tokyo
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Shigeo Tsujikawa
Department of Metallurgy, Faculty of Engineering, The University of Tokyo
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Takao Ogino
Central Research Laboratories, Nihon Parkerizing Co., Ltd.
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Shigeo Tanaka
Central Research Laboratories, Nihon Parkerizing Co., Ltd.