Pipe Welding Machine, Tank Welding Machine, Pipe Cutting Machine manufacturer / supplier in China, offering Large Oil Tank Girth Welding Machine and Horizontal Seam Welder, Large Oil Tank Construction Girth Seam Welding Machine with Single Side Welding and Double Side Forming, Simple and Portable Pressure Vessel Circular Seam Welding Carriage with Flexible Rails in Stock and so on.