... Q215, Q235, Q275, Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, Color Paint, 3PE ... overpass, road fence, traffic signs.(3).Construction engineering: steel structure construction, sports venue, three-dimensional garage, exhibition ... 0.5mm/m-Scale accuracy Ordinary precision 0- +50mmOrdinary precision 0- +70mmFine scale 0- +5mmFine scale 0- +15mmCutting ...