fusion welding metal

例句：

1. 1.The engineer used a special tool to fuse the two pieces of metal together.
   工程师使用一种特殊的工具将两块金属焊接在一起。
2. 2. The fusion welding process is essential for the construction industry.
   焊接过程对于建筑业至关重要。
3. 3.The metal was heated to a high temperature before being fused together.
   金属在被加热到高温后才被焊接在一起。