... of welding equipment 1, It is small and convenient for working,Operate flexible and convenient ,handle type design.2, ... NTK coverter.3, Automatic frequency tracking.4, Especially suitable for 1-15mm spot welding.5, Riveting,spot welding,pattern ... screw implanting,rivet joint.8,widely used for welding automotive interior trim and household appliance ultrasonic heat gun welding equipment for sale