"I have never seen such a dramatic change in the market character in such a short span of time," analyst Kapil Kaul, who runs the Center for Asia Pacific Aviation, said.
“我还从来没有见过在这么短的时间内市场性质发生如此戏剧性的变化，”亚太航空中心的负责人、分析师Kapil Kaul说。
Because of its economy, beauty, and less dead weight, it is widely applied to large span structures, such as large-scale stadium, exhibition center, works of decoration, and so on.
由于其自重小且经济美观，因此它被广泛地应用于大跨度空间结构中，如：大型运动场馆、会展中心、装饰小品等。
The steel Roof of the Beijing Sport University Track and Field Training Center is a large-span spatial steel tube truss structure.
北京体育大学田径训练中心屋盖为大跨度空间钢管桁架结构。
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