disk cutting edge

例句：

1. 1.The disk cutting edge is the thinnest part of a hard drive.
   磁盘切割边缘是硬盘的最薄部分。
2. 2. The engineer used a laser to cut the disk cutting edge.
   工程师使用激光来切割磁盘切割边缘。
3. 3.The disk cutting edge was sharp enough to cut through metal.
   磁盘切割边缘足够锋利，能够切断金属。