... welding machine for Tarpaulins,Tents,Billboards, Signs,Truck Covers,Canvas,Membrane. Main Application of High Frequency welding ... of large format tarpaulins, tents, shading systems, truck covers, swimming pool covers, airline hangars, billboards, signs, side curtains and ... welds up to 50mm wide2) Tents, shading systems, truck covers, swimming pool covers3) Tarpaulins, airport hangars, side curtains4) ...