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K. Nakamura
Catalysis Research Center, Hokkaido Univ.
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T. Oguchi
Dept.of Materials Science, Hiroshima Univ.
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H. Hasegawa
Dept.of Physics, Tokyo Gakugei Univ.
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K. Sueoka
Faculty of Engineering, Hokkaido Univ.
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K. Hayakawa
Catalysis Research Center, Hokkaido Univ.
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K. Mukasa
Faculty of Engineering, Hokkaido Univ.