Tensile membranes structure high frequency welding machine. professional welding tents, air domes, banners, truckcovers. Tensile membranes high frequency welding machine 1. Professional for welding tent, canvas, inflatable PVC, fabric, tarpaulin products ... / WS-10000S / WS-15000SD Power output: 4,000W, 5,000W, 8,000W, 10,000W,15,000W Voltage: 50 / 60HZ, AC380V, 3P ...