... manufacture seam welding machine,automatic welding machine FZN1000 is good for welkding cylinderic seam welder FZN10001. Description:FZN100 is ... an automatic longitudinal welding machine, which may be used to weld material of carbon steel, low alloy steel, stainless ... plasma weld and submerged arc welding system. It is very good to used in welding of pressure vessel, automobile accessory, electric ...