face and root side/trailing shields (关于焊接)? In addition to the torch, trailing shields together with backing shields or purges for blanketing the entire weld area on both the face and root side shall be employed to protect the molten and solidified weld and base metal from internal and surface contamination. 除了焊炬, 还应在面侧与底侧采用 拖尾保护加垫板保护 或吹扫(用于隔离保护整个焊接区),以保护 熔 固焊缝 以 及 母材 里外 不 受污染。(译文请指正,重点是标红句) [ ]查看更多3个回答 . 1人已关注