High Frequency Welding Machine for Speaker cover ,PP,P,Nylon .... etc plastic welding gastight,waterproof& ... water tanks, pipes welding, hairdryer, printer cartridges, vacuum cleaner storage tank.Sound chassis - speaker stencil, screws, welding, screw cap.The ... lights, batteries, fuel tanks, storage tanks, filters, automotive water tank and so on.Sealed containers - food packaging, bottle sealing ...