coarse diamond-point knurling roll

例句：

1. 1.The engineer used a coarse diamond-point knurling roll to smooth the surface of the metal.
   工程师使用粗钻石点滚轮来平滑金属的表面。
2. 2.The tool is designed for precision machining, and it uses a coarse diamond-point knurling roll to achieve high precision.
   该工具设计用于精密加工，它使用粗钻石点滚轮来实现高精度。
3. 3. The manufacturer recommends using a coarse diamond-point knurling roll for heavy-duty applications to ensure longevity and efficiency.
   制造商推荐在重型应用中使用粗钻石点滚轮，以确保持久性和效率。