1,4200W ultrasonic machine plastic double head welding 2, Applied to:PC, PE, ABS, acrylic material, etc. 3,15KHZ double head ... whole material of welded part vibrate through ultrasonic, but only to make appropriate vibration surface vibrate and generate heat; therefore, ... -acid batteries, 3-inch floppy disk, U disk, SD card, CF card, USB connectors,Bluetooth. Toys,stationery: folder, album, folding ...