... welding machine for Tarpaulins,Tents,Billboards, Signs,Truck Covers,Canvas,Membrane. Name of the machine :High Frequency welding ... 15KW-F1.F2Main Application :Applied for tarpaulin, sunshading canvas, painting canvas, film curtain and relatives for automatic stepping welding and ... welding ,be well meeting with materials of thick or thin. Machine groove deep and wide ,conveninent in continuous welding ...