... of the Box-beam Automatic Welding Production Line. This production line combinest the longitudinal and transverse structure, which ... , and so on.h-beam machine, h-beam steel, h-beam welding line, h-shape steel, h ... welding line, weiding line, weiding production line, steel welding productin line, steel production line, I-beam production line. Box-beam Automatic Welding Production Line machine ...