alloy amalgam

例句：

1. 1. The steel welding machine is an important tool for manufacturing alloys.
   我们使用的焊接机是制造合金的重要工具。
2. 2. Alloys are often used in the production of high-strength materials.
   合金常用于生产高强度材料。
3. 3. The engineer made a mistake by using the wrong alloy for the project.
   工程师在项目中使用了错误的合金，犯了一个错误。