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See Chinese contents: GB/T 13912-2020 GB/T 13912-2020: Metallic coatings--Hot dip galvanized coatings on fabricated iron and steel articles--Specifications and test methods
This Standard specifies the specifications and test methods for hot dip galvanized coatings on fabricated iron and steel articles. This Standard does not specify the after-treatment and protective coating of hot dip galvanized products.
