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*Masahiro Shiroishi
The Agricultural Technology Institute of Nagano Farmer's Federation
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Kouichi Nozaki
Faculty of Engineering, Shinshu University
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Masahiro Mizuno
Faculty of Engineering, Shinshu University
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Takahisa Kanda
Faculty of Engineering, Shinshu University
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Yoshihiko Amano
Faculty of Engineering, Shinshu University