Dobles Technology Co., Ltd is manufacturer of plastic welder such as geo membrane welding machine,hand extrusion welding gun,hot air blower,hot air roof welder,banner welder ,testing equipment that used for welding PE,PP,PVC membrane and plank in waterproofing projects like landfills,pools,water tanks ,pipes ,tunnels,PVC floors,advertising banners and roofs for more than 10years.With professional engineering team and after- sales service ,clients are covering almost countries in the world.