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Resistance welded pipe ERW is formed by hot rolled coil through forming machine. The skin effect and proximity effect of the high frequency current are used to heat and melt the edges of the tube blank.
Galvanized steel pipe, also known as galvanized pipe, is divided into two kinds of hot-dip galvanized pipe and Electro galvanized pipe. The hot-dip galvanized layer is thick, the coating is uniform, the adhesion is strong, and the service life is long.
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