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  • Factory directly price 30mm ss square steel pipe seamless tube 100×100

    Factory directly price 30mm ss square steel pipe seamless tube 100×100

    Square steel pipe is a kind of name of square pipe, that is, the steel pipe with the same side length.It is made of strip steel after processing. Drawing square pipe: generally, strip steel is unpacked, flat, curled, welded into a round pipe, and then rolled into a square pipe by the round pipe and then cut into the required length.