1,Professional welder 2.Orbit tube automatic weld machine ... elbow,the tube - flanges, tube-valves, carbon steel, alloy steel ,stainless steel filling wire or not filling wire.Function and ... standard, each group of welding scope can divide 1~2 section, input is simple, and not need ... water cooling system, equipped with 16 liters stainless steel tank, not affected by field water hydraulic conditions ...