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See Chinese contents: Q/BQB 400-2020 Q/BQB 400-2020: Package, mark and inspection document for cold-rolled product
This Standard specifies requirements for packaging, marking and inspection documents for cold-rolled steel sheets and steel strips, coated steel sheets and steel strips, and cold-rolled electrical steel strips (coils). Taking into account the usage habits of manufacturers and users of cold-rolled products. Steel strips are referred to as steel coils below.
