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B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
FR62776D1952-04-181952-04-18
Apparatus for the production of vibrations
ExpiredFR62776E
(en)