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本标准适用于直径2～6mm具有药皮的手工电弧焊接用低碳鋼和低合金高强度鋼焊条。焊条直径系指不包括药皮的焊芯直径。
This standard applies to the diameter of 2 ~ 6mm with a manual arc welding of low carbon steel and low alloy high strength steel electrode. Electrode diameter refers to the core diameter does not include the coating.