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Tungsten Carbide Composite Welding Bar Chemical composition ( Wt,%) WC Co Ni+Cu+Zn+Sn Cu+Zn+Sn Specification mm/Inch 63-65 5.2-6.2 / 30±2 1.6-3.2mm 1/16''-1/8'' 3.2-4.8mm 1/8''-3/16'' 4.8-6.4mm 3/16...