... machineLongmen welding machinesElectro-slad welding machineModel 60 hydraulic straightening machineEight-shots blasting machinesTen-shots blasting machinesNC drilling ... produce light and heavy steel structure buildings in protal frame and dome frame, such as warehouse, workshop, storage, hangar, ... dormitory building, bus station, gas station etc.Main frame: welded H beam and column ,surface of steel ...