automatic welding positioner

20 Tons Two Columns Positioner with Big Distance between two fixed columns China nuclear power industry 359 factory want to buy a special welding positioner for ther productions. We designed and produced for them .Two columns distance may reach to 8000 mm, the lifting up and down distance 4000 mm, the working table may lift up/down , tilt and revolve by motors. Double column elevating welding positioner is mainly used for solving problems of high position,also can weld seam