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*Syuji Miyamoto
Eastern Hokkaido branch office , Civil Engineering Research Institute
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Takaaki Abe
River Engineering Research Team, Civil Engineering Research Institute
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Sato Hirotomo
Eastern Hokkaido branch office , Civil Engineering Research Institute
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Akira Kakubari
Eastern Hokkaido branch office , Civil Engineering Research Institute
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Yoshishige Sato
Eastern Hokkaido branch office , Civil Engineering Research Institute