Investigate its reason, experts doubt and electric welders are concerned.
究其原因，专家怀疑与电焊工有关。
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…
The utility model provides a brake type shading and protecting device for electric welding, and the utility model is used for protecting the eyes and faces of electric welders.
本实用新型提供了一种电焊工保护眼睛及面部的闸式电焊遮光防护装置。
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