... Portable Plastic Spot Welding MachineProduction indroductionThe welding machine adopt closed negative feedback loop frequency automatic tracking system,with excellent frequency ... *160*290mmweight13kgApplicationUsed in spot welding,pressure welding,riveting,marking,sealing,screw implant, decals fusion welding etc, Widely used in ... operation. High Performance Handheld Plastic Spot Welding Machine