B06B
METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY,; e.g.; FOR PERFORMING MECHANICAL WORK 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