... , to convert the signal into a high-frequency mechanical vibrations, by virtue of the energy communicated to the welding head on ... & metal riveting, spot welding, embossing, folders positioning technology. 3, features:1. Small size, the work easy and has no footprint.2 ... . A frequency of 28 KHZ.3. Transducer chips imported by Japan.4. Auto-recovery frequency, easy to adjust.5, Size ...