... the ultrasonic welding theory. main used in air conditional copper tube .good gastightness Welding Principle Ultrasonic metal welding is the ... the world famous brand, lower utility costs.4, man-machine interface control, multi-parameter storage.5, energy detection mode, to ... contact, dissimilar metal sheets of mutual melting.7, the metal tube end sealing, cutting can be water, gas-tight.FEATURES ...