DIFF Subgroup
B06B 1/186 Full Title
Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency > wherein the vibrator is actuated by pressure fluid (B06B1/20 takes precedence)
B06B 1/186 Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency > wherein the vibrator is actuated by pressure fluid (B06B1/20 takes precedence)