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Yasumasa HIRATA
Shikoku Research Center, Forestry and Forest Products Research Institute
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Yoshio AWAYA
Department of Forest Management, Forestry and Forest Products Research Institute
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Tomoaki TAKAHASHI
Department of Forest Management, Forestry and Forest Products Research Institute
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Tatsuo SUEDA
Faculty of Agriculture, Ehime University
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Hayato TSUZUKI
Faculty of Agriculture, Ehime University