| 包括了usb传输的集中协议，令usb的硬件开发成为过去.-including a focus on the transmission usb agreement, usb hardware development the past. 下载 |
| Usb Mass Storage Class 协议的详细介绍，是英文的，有空的时候把它转成中文，在介绍给大家-Usb Mass Storage Class detailed description of the agreement is English, When the time to turn it into Chinese, in introducing to you 下载 |