Ultrasonic Heat Sinks Welding Machine For Car 20KHz/3000W Copper with Aluminium 0.7+0.7mm 1000N ... pull force Ultrasonic Metal Welding Machine(Heat Sinks for Car) Product Requirement: 1.FOR ULTRASONICALLY WELDED MATERIAL JOINT.WELD ... , connectors, each melt.5, various household appliances, automotive supplies, large-scale cooling block.6, electromagnetic switches, non-fuse switch high current ...