tack weld welding
粘性焊
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
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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。
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