合肥铁路枢纽南环特大桥钢桁拱杆件整体节点划线制孔新工艺
합비철로추뉴남배특대교강항공간건정체절점화선제공신공예
New Technology of Integral Joint Hole Streaking on Steel Truss Arch Rods of Hefei Railway Hub Southern Link Bridge