It equipped with a pick guard and again, steel string.
它配备警卫，并再次回升，钢弦。
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 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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