... UL Certification 2.edge welding 3.fold bag welding 4.butt welding,PVC,plastic welding project screen welding machine After sale services: ... max fabric welding width up to 4.0m2. edge welding,weld mark adjustable3. automatic edge welding,creasing welding,creased width ... . welded curtain with good anti-tearing, good welding quality, high welding efficiency,no fluffy,no burning,no color fading9. ...