hammer milling

例句：

1. 1. The hammer milling process is crucial for the production of steel.
   锤式磨削过程对于钢铁生产至关重要。
2. 2.The engineer used a hammer milling machine to produce the metal parts.
   工程师使用锤式磨削机生产金属部件。
3. 3. During the hammer milling process, the material is repeatedly struck with a hammer to remove impurities.
   在锤式磨削过程中，材料被反复用锤子撞击以去除杂质。