ultrasonic welding PVC product 1.Japan piezoelectricity ceramic transducer 2.PP,PE,PC, ... welding nonrectangular columns,avoid fadeaway.3,automatic overloading protection device4,Import converter and steel booster,durable stability5,Frequency adjustable and automatically ... therefore, there is no worry about any scar left on product surface, which is the characteristic of conductive weld. While welding ...