创建窗户上曲线与曲线2的看法命令，利用它作为一个参考曲线曲面创建窗口。

Create the Windows upper curve with the curve from 2 views command to use it as a reference curve for Windows surface creation.

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创建屋顶截面，以引导线作为引导，当采用曲线网格命令来建立曲面。

Create the roof sections to guide the roof surface when using surface from curve network.

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