... Automatic NC iron production line, 20B hydraulic plate shears, 3200t press machine, 250t trial assembly crane, 20t gantry crane, Gantry-type ... NC planer drilling machine, Automatic numerical control, large hot galvanizing line, Large assembly ... iron drilling line, 315 4-column press machine, Automatic seam-suturing submerged-arc welding center, Straight flange ...