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Shigeyuki NAGAI
Graduate school of Sci. & Tech., Niigata Univ.
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Hiroki IIYOSHI
Graduate school of Science & Technology, Niigata University
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Itaru KOURAKATA
Graduate school of Science & Technology, Niigata University
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Kensaku KAWAKAMI
Dept. of Mechanical Eng. Hakodate National College of Technology
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Toshiaki HARA
Faculty of Engineering, Niigata University