... finishing operationsCan be used in all kinds of sectors 300W/600W/900W Optional Machine features: 1, ultrasonic plastic welder using the ... body direct-drive, welding high stability. 7, this machine especially used in SD card, memory card, SM card, U disk, ... dovoted in the design, manufacturing and sales of plastic welding machines, ultrosonic welding machines and non-standard machine for more than 10 ...