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*Ryunosuke Sato
Graduate school of Engineering, Utsunomiya University
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Yoshio Ichida
Graduate school of Engineering, Utsunomiya University
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Hideo Ueno
Graduate school of Engineering, Utsunomiya University
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Takamasa Terabayasi
Graduate school of Engineering, Utsunomiya University
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Hitoshi Kajino
Mitsui Mining & Smelting Co. Ltd.
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Masakazu Sato
Mitsui Grinding Wheel Co. Ltd.