FI (list display)

  • B06B3/00
  • Processes or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic or ultrasonic frequency HB CC 5D107
  • B06B3/02
  • .involving a change of amplitude HB CC 5D107
  • B06B3/04
  • .involving focusing or reflecting HB CC 5D107
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