half through truss 半穿式桁架

half-through truss 半穿式桁架 ; 中承式桁架

half across truss bridge 半穿式桁梁桥

half across steel truss 半穿式桁梁

half-across steel truss 半穿式钢桁梁

half-through steel truss 半穿式钢桁梁

half-across steel truss bridge 半穿式钢桁梁桥

half across steel truss bridge 半穿式桁梁桥

half-through steel truss bridge 半穿式钢桁梁桥