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Masao HASHIBA
Faculty of Engineering, Hokkaido University
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Yuko HIROHATA
Faculty of Engineering, Hokkaido University
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Tomoaki HINO
Faculty of Engineering, Hokkaido University
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Toshiro YAMASHINA
Faculty of Engineering, Hokkaido University
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Akira MISUMI
Electron Tube & Devices Div., Hitachi Ltd.
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Shigemi HIRASAWA
Electron Tube & Devices Div., Hitachi Ltd.