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For downspout forming machine, the common forming methods mainly include pressing, forging, extrusion and welding, so that the equipment can be formed.
a wrought iron–steel sheet was coated with zinc and then roll-formed into profiled sheets.
due to the advancement of roll forming technology, people turn to roll formed pipes, and in modern times, most of the downspouts or rainspouts have been produced from pre-painted steel, galvanized steel, aluminum or copper.