The outer diameter of the steel pipe should be 48-51mm, and the wall thickness should be 3-3 Steel pipes with severe corrosion, bending, or cracks of 5mm should not be used.
scaffolding adjustable base jack
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Construction Technology ｜ Ministry of housing and urban rural development: the evaluation (certification) conclusions of architecture and civil engineering in Colleges and universities in 2021 are published!
Emergency announcement! Road closure construction of Guangming overpass bridge on Huancheng Road for 40 days!
