Two arch ribs are installed in transversal direction to form a"double bow system".
四川绵阳飞云大桥的主桥系三跨系杆拱桥，横向设两根拱肋，构成“双弓体系”。
The results can offer references to the design and construction of double-arch tunnel.
这些研究成果对双连拱隧道的设计与施工具有重要指导作用。
The results can offer references to the design and construction of double-arch tunnel.
这些研究成果对双连拱隧道的设计与施工具有重要指导作用。
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