... and high precision; products.35KHz/40KHz optional Ultrasonic plastic welder features: 1, ultrasonic plastic welder using the Switzerland original transducer, ... automatic frequency tracking function. 4, adopt Japan, Matsushita human-machine interface, PLC control, the time control accuracy up to ... one direct-drive, high welding stability. 7, this machine is especially adapt to used in SD card, memory ...