The steel roof structure system of National Indoor Stadium is bidirectional truss string structure.
国家体育馆屋盖结构为双向张弦网格结构体系。
It has a steel structure with a composite roof.
建筑的屋顶采用了复合钢结构。
The steel structure, after being lifted to the roof shall be welded on the structure.
钢结构吊装至屋顶后，焊接在结构上。
The roof structure is composed of steel trusses.
屋顶的结构是钢桁架。
The roof structure is composed of steel trusses.
屋顶的结构是钢桁架。
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