铜焊

例句：

1. 1. The copper welding process is crucial for the construction of bridges.
   铜焊接工艺对于桥梁的建设至关重要。
2. 2. The engineer used a special type of solder to join the metal parts together.
   工程师使用一种特殊的焊料将金属部件连接在一起。
3. 3. During the construction, the workers had to use copper brazing techniques to ensure the joint was secure.
   在施工过程中，工人们必须使用铜焊技术来确保接头牢固。