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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。
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The roof structure is composed of steel trusses.
屋顶的结构是钢桁架。
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The roof structure is composed of steel trusses.
屋顶的结构是钢桁架。
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