High Frequency Welding Machine For PVC ,Tarpaulins,Tents,Billboards,Signs,Trucks Covers,Canvas,Membrane. Antiflash NL-5557,CE Stationary High Frequency Welder For Tarpaulins, 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. ...