... featuer of Ultrasonic hand welding units 1, It is small and convenient for working,Operate flexible and ... tracking.4, Especially suitable for 1-15mm spot welding.5, Riveting,spot welding,pattern welding,dot welding,etc.6,Whole-set ... welding for plastic part,screw implanting,rivet joint.8,widely used for welding automotive interior trim and household appliance Ultrasonic hand welding units for ...