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Tsutom YOTSUYA
Osaka Pref. Indus. Res. Institute
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Ziro ISHIBE
Osaka Electro-Communication University
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Masaaki YOSHITAKE
Osaka Pref. Indus. Res. Institute
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Yoshihiko SUZUKI
Osaka Pref. Indus. Res. Institute
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Junya YAMAMOTO
Osaka University Low Temperatiure Center