Foreword ultrasonic electronics
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Ken-ya Hashimoto | Koichi Mizutani | Jun Kondoh | Hiroyuki Hachiya | Yasuaki Watanabe | Shin-ichiro Umemura | Kentaro Nakamura | Akira Harata | Shoji Kakio | Iwaki Akiyama | Hideyuki Hasegawa | Nobuki Kudo | Takao Tsuchiya | Mami Matsukawa | Kyuichi Yasui | Keiji Sakai | Pak-Kon Choi | Subaru Kudo | Tatsuro Matsuoka | Hirotugu Ogi | Sinichi Takeuchi | Ken Yamada