face and root side/trailing shields （关于焊接）？ 原帖由 i-seek-u 于 2008-9-13 14:47 发表 on both the face and root side 这个应该是根焊和盖面焊 仔细看了看又改主意了，看看我给出的附件： 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 在焊缝的正反两面采用拖罩、背面保护气罩或充气 的方法对整个焊接区域进行隔离保护，使熔融固化的焊缝及母材里外不受污染。 查看更多
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