About NAKAYAMA TOMOAKI
About YAMASHITA KIYOTAKA
About 超音波Techno
About ultrasonic motor
About reversal
About progressive wave
About acoustic wave
About characteristic
About numerical analysis
About driving characteristics
About friction drive
About Sound in general
About Transmission equipment
About 超音波モータ
About アクチュエータ
About 波型
About 反転
About 現象