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Masaaki Takashige
College of Science and Engineering, Iwaki Meisei University, 5–5–1 Iino, Chuohdai, Iwaki–shi, Fukushima 970
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Sin–Ichi Hamazaki
College of Science and Engineering, Iwaki Meisei University, 5–5–1 Iino, Chuohdai, Iwaki–shi, Fukushima 970
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Nobutaka Fukurai
College of Science and Engineering, Iwaki Meisei University, 5–5–1 Iino, Chuohdai, Iwaki–shi, Fukushima 970
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Fuminao Shimizu
College of Science and Engineering, Iwaki Meisei University, 5–5–1 Iino, Chuohdai, Iwaki–shi, Fukushima 970