smooth welds
光滑的焊缝
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A welding method that produces welds that are smooth and free of defects such as automatic orbital welding should be employed.
应使用产生平滑无缺陷的焊缝的焊接方法例如自动轨道焊。
youdao
I find these welds are not as good as the tabletop version, as control is not as smooth.
我觉得这些焊缝不是不如桌上的版本，作为控制是不顺利。
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