... Frequency PVC welding machine For Tarpaulins, Tents, Billboards, Signs, Truck Covers.The Series of High Frequency ... specifically for production of large format tarpaulins, tents, shading systems, truck covers, swimming pool covers, airline hangars, billboards, signs ... 50mm wide2) Tents, shading systems, truck covers, swimming pool covers3) Tarpaulins, airport hangars, side curtains4) Advertising signs ...