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See Chinese contents: GB/T 3670-2021 GB/T 3670-2021: Covered electordes for manual metal arc welding of copper and copper alloys
This Document specifies the models, technical requirements, test methods, re-inspection and technical delivery conditions of copper and copper alloy electrodes. This Document applies to copper and copper alloy electrodes whose copper content exceeds any other element content in the deposited metal.
