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Hot dip galvanized square tubes is used square tube strip or plate after curl forming in the hot dip galvanized pool through a series of chemical reactions forming the square tube; It is also possible to bend the cold-rolled hollow square cross-section and then hot-roll or cold-roll the galvanized steel sheet, and then weld the steel pipe with high frequency. Hot dipped hollow section advantage: Superb corrosion resistance Low maintenance requirements for lower long-term costs
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