I am, electric welders engaged in manual arc welding and carbon dioxide welding work, through these years of electric welding work my technology …
我是电焊工，从事手工电弧焊和二氧化碳气体保护焊工作，通过…
I am, electric welders engaged in manual arc welding and carbon dioxide welding work, through these years of electric welding work my technology …
我是电焊工，从事手工电弧焊和二氧化碳气体保护焊工作，通过…
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