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See Chinese contents: GB/T 3078-2008 GB/T 3078-2008: Quality structural steel cold drawn bars
This Standard specifies the classification, ordering information, dimensions, shape and allowable deviation, technical requirements, test methods, inspection rules, packing, marking, and quality certificate of structural steel cold drawn and ground bars. This Standard is applicable to the quality carbon structural steel and alloy structural steel (round steel, square steel, and hexagonal steel) cold drawn steel bars.
