... Tents, Billboards, Signs, Truck CoversThe Series of High Frequency welding machine for Tarpaulins,Tents,Billboards, Signs,Truck Covers,Canvas,Membrane. ... Name of the machine :High Frequency welding machine HR-8/10/12/15KW-F1.F2Main Application : ... , ground liners, ecomembranesTechnical and Safety Features:1) Precision line and curved welds up to 50mm wide2) Built in ...