... ,large-amount extrusion and high efficiency,the advantage is for welding narrow gap and corners where is not easy to reach ... ,hot air gun:1600w Wind temperature: 20-600°c Heating temperature when extruding: 200-300° c Welding speed: 2kg/h Diametere of welding ... project, cultivation pond anti-seepage project, roofing waterproofing project etc. Hot sale Lesite hdpe pipe extruder welding machine