... that will greatly IntroductionHLH type submerged arc welding machine applicable to Box-shaped column production line, landfill ... base, can replace the cantilever cubmerged arc welding machine, can choose a unipolar or multipolar welding, the ... 2.2Troley return speed(m/min)2.5Whole machine power(Kw)8.5Detailed Product Description1.Box-shaped ... section size(mm); Thickness:16-80 Gantry auto-welding machine