... operation 3. pneumatic 1. CCTV high frequency welding machine 2. 2-position operation 3. pneumatic Adv.:high- ... efficiencyINTRODUCTION:5kw double heads high frequency welding machine is suitable for raincoat ,PVC stationery welding etc. ... umbrella, handbag, packaging bag, wallet, leather belt, mobile cleaner, electrical hot water bag, reflective products, baby safety seat, ...