Our ultrasonic technology can remove burrs and clean at the same time by irradiating strong ultrasonic waves into water to generate cavities (micro vacuum core group) with a maximum diameter of 10 mm, and the positive and negative shock waves generated at the time of their formation. It is effective for machining metals, plastics, ceramics, and their composite materials, and for deburring and cleaning. It is the world’s only technology. It can be used for polishing without any polishing medias.