... SS cold-rolled sheet ,thickness 0.53-2.5m 2,Seam width no more than 3mm 3,Welding speed no less ... SS cold-rolled sheet ,thickness 0.53-2.5m 2,Seam width no more than 3mm 3,Welding speed no less ... WATER HEATER ACCORDING TO CUSTOMER’S REQUIREMENT AND NEED. straight seam welding machine for inner and outer tanks of solar Water ...