- Used for the automatic welding of the four long straight weld of the box girder. With the workpiece fixed and the welding gantry moving, it can complete the multi-pass welding for the four welds of the box girder by a single clamping.
- Two SAW welding heads and two gas-shielded welding head are equipped, which enables it to weld in either mode.
- Automatic tracking device is equipped on the gas shielded welding head to make automatic welding of long weld.
- It can make multi-pass gas-shielded welding.
- The workpiece is automatically turned by the positioner.