Ultrasonic Cleaner (1) Lowest back-repair rate (2) Safe (3) 3L,4L,5L,6L,10L,22L,33L and big ... equipment OEM. Ultrasonic Cleaner:(1) Lowest back-repair rate(2) Safe(3) 3L,4L,5L,6L,10L,22L,33L and big ... and the soiling.They are often employed for cleaning of jewellery, lenses and other optical parts, coins, watches, dental and surgicalinstruments ...