profile of fillet weld

例句：

1. 1. The engineer used a fillet weld to join the two pieces of metaltogether.
   工程师使用搭接焊缝将两块金属连接在一起。
2. 2. The butt weldwas visible through the metal surface.
   但焊点通过金属表面可见。
3. 3. Thebutt seam iswhere the two pieces of metalmeet without any welding.
   但焊缝是两块金属没有焊接就相遇的地方。