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*YUICHI KAWABATA
Civil Engineering Research Institute for Cold Region, Public Works Research Institute
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MAKOTO KIRIISHI
Civil Engineering Research Institute for Cold Region, Public Works Research Institute
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TETSUYA TAKADA
Civil Engineering Research Institute for Cold Region, Public Works Research Institute
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ROBERTO TOKUNAGA
Civil Engineering Research Institute for Cold Region, Public Works Research Institute
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NAOTO TAKAHASHI
Civil Engineering Research Institute for Cold Region, Public Works Research Institute