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”。

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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”。

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