The optimum programme can be used to design four-connecting lever pneumatic roof-window mechanism of all kinds of multi-span plastic greenhouses by changing load and structure parameters.

通过改变载荷参数和结构参数，优化模型可用于其它塑料温室的气动四连杆天窗机构的设计。

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Underwater placement of bridge's platform and cradle construction method for multi-span continuous box-girder structure constitute the construction feature of Fuyang bridge in Zhejiang province.

以水下浇筑大桥承台和采用挂篮法施工多跨连续箱梁结构是浙江富阳大桥工程的重头戏。

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Performance based assessments are carried out on semi - continuous frames, multi - story structure and large- span arched frame exposed to localized fire.

对承受局部火灾的半连续框架、多高层及大跨拱形桁架采用了基于性能的分析方法。

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