... Covers.The Series of High Frequency welding machine for Tarpaulins,Tents,Billboards, Signs,Truck Covers,Canvas,Membrane. Main ... machine is designed specifically for production of large format tarpaulins, tents, shading systems, truck covers, swimming pool ... Tents, shading systems, truck covers, swimming pool covers3) Tarpaulins, airport hangars, side curtains4) Advertising signs and billboards5) ...