... High Frequency PVC welding machine For Tarpaulins, Tents, Billboards, Signs, Truck Covers.The Series of High Frequency welding machine ... Covers,Canvas,Membrane. Main Application of High Frequency welding machine:Applied for tarpaulin, sunshading canvas, painting canvas ... *1050MM400*1550MMWelding time0~10S Adjustable Hihg Frequency welding PVC machine for Tarpaulins, Tents, Billboards, Signs, ...