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Galvanized coils are materials produced through a continuous hot-dip galvanizing process using hot-rolled steel strips or cold-rolled steel strips as the base plate. Hot-dip galvanized sheets are supplied as rectangular flat sheets after cross-cutting; hot-dip galvanized coils are supplied as rolls after being rolled. Their main characteristics are: strong corrosion resistance, good surface quality, conducive to deep processing, economical and practical, etc.