HZ Single Arm Longitudinal Seam Welding Machine 1.45 Steel Track 2.Light Weight,High Strength 3.High Safe Factor HZ Single Arm Longitudinal Seam Welding Machine Description:This machine adopt automatic submerged arc welding ,recover the welding flux. The welding is nice, with strong penetration,forming one time,high welding efficiency,the speed is 1-3 meters/minute,3 times to gas shielded welding ...