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See Chinese contents: GB/T 13808-1992 GB/T 13808-1992: Wrought copper and copper alloys. Extruded rods and bars
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage of wrought copper and copper alloys - extruded rods and bars. This standard applies to round, square, hexagonal wrought copper and copper alloys - extruded rods and bars.
