powder metallurgy

例句：

1. 1.Powdered metallurgy is a process that involves mixing and compacting powdered materials to form a solid structure.
   粉末冶金是一种涉及混合和压缩粉末材料以形成固体结构的过程。
2. 2. The powder metallurgy industry plays an important role in the development of new materials.
   粉末冶金行业在新材料的发展中起着重要作用。
3. 3. In powder metallurgy, the material is first ground into a fine powder, then heated and compressed to form a dense structure.
   在粉末冶金中，首先将材料研磨成细粉，然后加热并压缩以形成致密的结构。