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Hideo Shimoda
Research Laboratory of Muroran Plant, the Japan Steel Works Ltd.
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Hiroshi Ishizuka
Research Laboratory of Muroran Plant, the Japan Steel Works Ltd.
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Ryuichi Chiba
Research Laboratory of Muroran Plant, the Japan Steel Works Ltd.
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Susumu Sawada
Research Laboratory of Muroran Plant, the Japan Steel Works Ltd.
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Keizo Onishi
Research Laboratory of Muroran Plant, the Japan Steel Works Ltd.