dead smooth file

例句：

1. 1. The company is looking for a dead smooth file to replace the old one.
   公司正在寻找一个死平滑文件来替换旧的。
2. 2. The new software has a dead smooth file that makes it easy to use.
   新软件有一个死平滑文件，使使用变得容易。
3. 3. The engineer used a dead smooth file to make the machine run smoothly.
   工程师使用了死平滑文件使机器运行顺畅。