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。
The system and the culture have the bidirectional construction relations.
制度与文化具有相辅相成的双向建构关系。
The system and the culture have the bidirectional construction relations.
制度与文化具有相辅相成的双向建构关系。
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