concave weld

• 凹焊缝,轻型焊,凹面焊,凹形焊缝

concave weld的用法和样例：

例句

1. Dye penetrant examination of the completed weld.
   对已完成的焊缝进行着色渗透检测。
2. Weld identification single hole punch.
   鉴别焊缝的单孔冲压机。