单词tack weld
un.: 定位焊点；临时点焊；平头焊接；点固焊
网络: 点固焊点
点固焊
平头焊接
临时点焊
定位焊点
Having been practiced for several years, a new butt method for spiral welded pipe, the two spots tack-weld butt was made out.
通过几年来的实践，摸索总结出了一种螺旋焊管对接新方法——两点点固对接法。
Same length and space of tack weld
点焊间隔及焊道长度是否适当