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*Masayoshi TAKAHASHI
Hokkaido Research Center, Forestry and Forest Products Research Institute
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Hajime UTSUGI
Hokkaido Research Center, Forestry and Forest Products Research Institute
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Katsumi YAMANOI
Hokkaido Research Center, Forestry and Forest Products Research Institute
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Yasuko MIZOGUCHI
Hokkaido Research Center, Forestry and Forest Products Research Institute