Each group has two sets for the 90 degree Hydraulic Overturning Rack H-Beam Production Lines,welding machine,Box- ... group has two sets for the 90 degree Hydraulic Overturning Rack, which is mainly used for 90 degree overturning of Box-beam after the ... line, steel production line, I-beam production line. YFL TYPE 90 degree Hydraulic Overturning Rack