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*Kida Masato
Production Technology Team, Methane Hydrate Research Center, National Institute of Advanced Industrial Science and Technology
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Sakagami Hirotoshi
Dept. of Materials Science and Engineering, Kitami Institute of Technology
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Nobuo Takahashi
Dept. of Materials Science and Engineering, Kitami Institute of Technology
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Jiro Nagao
Production Technology Team, Methane Hydrate Research Center, National Institute of Advanced Industrial Science and Technology