So, it is mandatory to process steel structure.

又是轻钢结构的，但已经人去屋空。

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So, it is mandatory to process steel structure fire-protection.

所以，必须对钢结构做防火处理。

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In order to ensure accuracy, and Assembly of steel structure in the installation process, the overall on the truss computed deformation and surveillance.

为了保证钢结构安装精度，在吊装过程中，对桁架的整体变形进行了计算和监测。

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