... precision; products.35KHz/40KHz optional Ultrasonic plastic welder features: 1, ultrasonic plastic welder using the Switzerland original ... cylinder, transducer three in one direct-drive, high welding stability. 7, this machine is especially adapt to ... welding. 8, it is also suitable for precision welding of workpieces, riveting, embossing, dots and other welding processes. ultrasonic welding machines