HPb633 GB Total Materia
HPb633, GB, GB/T 13809, Wrought copper and copper alloy rectangular bars, GB/T 14954, Brass wires, GB/T 5231, Designation and chemical composition of wrought copper and copper alloys, GB/T 21652, Copper and copper alloy wire, GB/T 26048, Freecutting copper alloy wire, GB/T 26306, Freecutting copper alloy rod and bar, GB/T 4423, Copper and copperalloy colddrawn rod and bar, GB 5232 ...