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Atsushi Sogabe
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Hitoshi Tanaka
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Takami Miyamoto
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Tsutomu Takahashi
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Author's Organization:Chuden Engineering Consultants Co.,Ltd., Kyushu Branch,Yachiyo Engineering Co.,Ltd., Departmento of Eearth and Planetary Systems Sciences,Faculty of Science,Hiroshima University Kyushu Branch,Yachiyo Engineering Co.,Ltd.,