... b.no pollution and no noise c.with CE Advantages 1> Security: a: Adopting automatic submerged-arc welding technologyb: all of ... every manufacture process, manufacture date, operators, etc. d:equipped with antiexplosion device, safety valves, emergency valves, pressure and temperature meters, vacuum ... wires which can be deep-processed or sold directly with its value. 3> Energy conservation and low cost ...