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It is a term for square pipes and rectangular pipes, that is, steel pipes with equal and unequal side lengths. It is rolled into strip steel after process treatment. Generally, the strip steel is unpacked, flattened, crimped, and welded to form a round tube, then the round tube is rolled into a square tube and then cut to the required length.
It is a term for square pipes and rectangular pipes, that is, steel pipes with equal and unequal side lengths. It is rolled i
