1. This manipulator welding column & boom combined with auto welding machine for Tank, Pipe, Vessel and X-Y axis auto moving & 90 angle adjusting
2. To made by double column and moving to up, down, left, right and forwaed, back in stability & freely.
3. For safety use to the screw function od up & down moving it's not chain.
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At least 10~1000 characters.