焊接剂

例句：

1. 1. The metal parts were carefully welded together to form a strong structure.
   金属部件被仔细地焊接在一起，形成了一个坚固的结构。
2. 2. The carpenter used a torch to weld the metal together.
   木匠使用火焰将金属焊接在一起。
3. 3. The welding process requires precision and skill to ensure a strong bond.
   焊接过程需要精确和技巧以确保牢固的连接。