青云翻译

Roof purlins using the roots of adjacent purlins as a group, unified lifting, installation of air dispersion. After installation of the same cross, slope detection purlins to be consistent with the design of the roof slope. Purlins straightness tolerance shall be controlled within the tolerance to b

Using adjacent number root Purlin roof purlins for a group, unified lifting, air with separately installed. The same cross-after installation, detection Purlin roll, to be consistent with the design of roof slope. Purlin linearity shall be within the tolerance range, variance is to be adjusted.

Using adjacent number root Purlin roof purlins for a group, unified lifting, air with separately installed. The same cross-after installation, detection Purlin roll, to be consistent with the design of roof slope. Purlin linearity shall be within the tolerance range, variance is to be adjusted.