... Billboards, Signs, Truck CoversThe Series of High Frequency welding machine for Tarpaulins,Tents,Billboards, Signs,Truck Covers,Canvas,Membrane. Name ... general technical fabric joining. Machine can be fitted with special curved electrodes for welding round window profiles made of clear ... to 1800mm one time.European-model squarness high frequency vibration bos,more realible and Stable in output. Main ...