... 0-22.0mm 2. Advanced Roller Extrusion equipment line. 3.Certification:CE,ISO1. STANDARD:GB/T3094-2000, GB/T6728 ... Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, Color Paint, 3PE; Or Other ... railway, aviation, expressway, overpass, road fence, traffic signs.(3).Construction engineering: steel structure construction, sports venue, three-dimensional ...