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无间隙焊缝；[机]底边无缝焊
1、contact closed───接点闭合
2、closed───adj.关着的；不公开的；v.关；结束；接近（close的过去分词）
3、weld symbols───焊接符号
4、fillet weld───角焊缝，填角焊，贴角焊
5、autogenous weld───气焊
6、weld wheels───焊接车轮
7、scarfed weld───斜面焊接
8、weld together───焊接在一起
9、gouged weld───福利
1、Reducing partial rigidity: When closed weld or the weld which has less rigidity are welded, we can take anti-deformation way to reduce the partial rigidity of component.───降低局部刚性：焊接封闭焊缝或其刚性较大的焊缝时，可以采取反变形法来降低结构的局部刚性。
2、Numerical analysis of multi-pass welding residual stress for typical closed weld───典型封闭环焊缝多道焊焊接残余应力的模拟分析
3、valve in a fully closed position helps prevent weld spatter from falling directly onto the mating faces of the seats.───阀瓣处于完全关闭位置也能够避免焊花直接掉在阀座和阀瓣的连接面上。
4、Value of torsion for less than the size of fillet weld height of small-opening fillet weld is the same as that of corresponding closed fillet weld.───具有不大于焊脚尺寸的小开口焊缝，其所能承受的扭矩与相应闭合角焊缝所能承受的扭矩是几乎相同的。