Several Steel
The square-shaped steel is made of cold-drawn thick steel plates with a cross-section of a square-shaped, which are connected with each other according to screws, and are cold-rolled and formed by hot-rolled strip steel or plate. Also known as U-shaped steel with outturned edge, it is an aluminum profile used for greenhouse vegetables, load-bearing beams and steel purlins of greenhouses, and building of RVs.
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