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Takayuki HIRAI
Oita Univ, Faculty of Eng. Dep. of Human Welfare Eng.
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Tetuya ITOU
INAX, Technical Research Laboratory Building Material Headquarters
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*Touiti FUJITA
INAX, Technical Research Laboratory Building Material Headquarters
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Masafumi INOUE
Oita Univ, Faculty of Eng. Dep. of Architecture