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*Youichi Tsubota
Faculty of engineering, Hokkaido university
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Junichi Kaneko
Faculty of engineering, Hokkaido university
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Mikio Higuchi
Faculty of engineering, Hokkaido university
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Takehiro Shimaoka
Faculty of engineering, Hokkaido university
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Kouhei Toui
Faculty of engineering, Hokkaido university
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Hiroyuki Ishibashi
Hitachi Chemical Company, Ltd