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*Yasuhiko Ito
Civil Engineering Research Institute for Cold Region
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Hirotaka Takechi
Civil Engineering Research Institute for Cold Region
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Hiroki Matsushita
Civil Engineering Research Institute for Cold Region
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Takeshi Yamada
Civil Engineering Research Institute for Cold Region
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Masaru Matsuzawa
Civil Engineering Research Institute for Cold Region
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Yasuhiko Kajiya
Civil Engineering Research Institute for Cold Region