acoustic pingeracoustic spark gap transmittersonatorsonic generator声波: sonic wave; sound wave; acou ...发生器: gen; rattle; producer; devis ...超声波发生器: supersonic generator; supersonicgenerator; ultra sonator; ultrasonic generator; ultrasonic wave generator声呐声波发生器: sonar thumper unit声纳声波发生器: sonar thumper unit下载手机词典可随时随地查词查翻译