amalgam burnisher

例句：

1. 1. The amalgam burnisher is used to polish the surface of metal objects.
   合金抛光器用于打磨金属物体的表面。
2. 2. The engineer used an amalgam burnisher to smooth out the rough edges of the machine parts.
   工程师使用合金抛光器来平滑机器零件的粗糙边缘。
3. 3. The amalgam burnisher was a revolutionary tool that improved the quality of metalwork.
   合金抛光器是一台革命性的工具，提高了金属工艺的质量。