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[CS Electrodes] J421 E4313 AWS A5.1 E6013 High Carbon Steel Welding Electrodes 2.5mm 3.2mm 4.0mm 5.0mm LT·E4313 2.0/2.5/3.2/4.0/5.0 mm Carbon Steel Electrodes Conform to Standard GB/T 5117 E4313 AWS ...