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Haruo Endoh
Tohoku Gakuin Univ., Dept. Mech. Eng. & Dept. Appl. Phys.
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Keita Inomata
Tohoku Gakuin Univ., Dept. Mech. Eng. & Dept. Appl. Phys.
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Katsuhiko Miyamoto
Tohoku Gakuin Univ., Dept. Mech. Eng. & Dept. Appl. Phys.
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Yoichirou Hiwatashi
Tohoku Gakuin Univ., Dept. Mech. Eng. & Dept. Appl. Phys.
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Tsutomu Hoshimiya
Tohoku Gakuin Univ., Dept. Mech. Eng. & Dept. Appl. Phys.