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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The latest notice – Notice on matters related to the evaluation of construction safety production standardization – carried out in the form
The construction of Taiping River bridge beam pile foundation will be completed by the end of the year, and Jiangping Expressway will be
