High Frequency Welding Machine for Speaker cover ,PP,P,Nylon .... etc plastic welding gastight,waterproof& stable ... of the leak is very reliable. Apply to the PP, PC, ABS, nylon, thermoplastic, and with glass fiber, plastic and so ... welding, hairdryer, printer cartridges, vacuum cleaner storage tank.Sound chassis - speaker stencil, screws, welding, screw cap.The automotive industry - car rear ...