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*Norihiro Ishii
Graduate Student, Univ.of Shinshu
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Yoshiharu Asano
Prof.,Univ.of Shinshu, Institute of Mountain Science, Univ. of Shinshu, Dr.Eng.
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Hideki Takamura
Associate Prof., Univ.of Shinshu Institute of Mountain Science, Univ. of Shinshu, Dr.Eng.