Tack weld shall be the same with welding process of formal welding.
定位焊应与正式焊接的焊接工艺相同。
The problems of influences of edge displacement disturbance, tack weld disturbance and high arc temperature on the sensor have been solved.
在传感器方面解决了错边干扰、定位焊点干扰及电弧高温的影响。
Besides, centering and tack welding by laser beam should be avoided as centering point and tack-welding point can influence weld quality largely.
但焊缝质量受激光对中点和点焊点的影响很大，应尽量避免采用激光对中及点焊。
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。
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。
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