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Galvanized sheet is a metal material that uses steel as the substrate and is coated with a layer of zinc on the surface. Usually, hot-dip galvanizing or electroplating methods are used to complete the galvanizing process. Galvanizing can effectively prevent steel from rusting and corroding in damp or corrosive environments, thereby extending its service life.

The main material for car doors is cold-rolled galvanized sheet, which is formed by rolling, stamping, and welding. The slide rail assembly seat slide rail is formed through high-precision stamping, welding and other processes, and the sheet metal processing requirements for automotive components are relatively strict, requiring a large amount of special certification. The aluminum door frame assembly is mainly made of aluminum profiles, which are stamped and processed through sheet metal processing technology.