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 stressed-arch frame is a new type of prestressed steel structure system.
张拉弦钢拱架结构是一种新型的预应力钢结构体系。
A wheel-type travel system is fixed below the arch-bridge-type stand;
在拱桥式机架上面固定有发动机、与发动机相连的传动系统；
A wheel-type travel system is fixed below the arch-bridge-type stand;
在拱桥式机架上面固定有发动机、与发动机相连的传动系统；
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