... frequency tracking function. 4, adopt Japan, Matsushita human-machine interface, PLC control, the time control accuracy up ... transducer three in one direct-drive, high welding stability. 7, this machine is especially adapt to used in SD card ... workpiece welding. 8, it is also suitable for precision welding of workpieces, riveting, embossing, dots and other welding processes. ultrasonic welding machines ...