three-main-truss steel truss girder bridge
... steel truss stiffening girder 高性能钢 middle-through steel truss girder 半穿式钢桁梁 three-main-truss steel truss girder bridge 三桁钢桁梁桥 ...
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three-main-truss steel truss girder bridge
三主桁架钢桁架梁桥
以上为机器翻译结果，长、整句建议使用 人工翻译 。