... medium ring cylinder,longitudinal seam welding HB welding positionermain purpose:HB series of all-position welding positioner is a kind of equipment ... in flux or not), metal arc welding (CO2/MAG/MIG welding), plasma welding, submerged arc welding machine power source to compose an ... have good stability, also move easily. 5, Hand control box operation, digital display and can be preset speed 6, ...