未验证 提交 d8f40fcc 编写于 作者: O openharmony_ci 提交者: Gitee

!1838 Delete unnecessary parts in the .Md file

Merge pull request !1838 from 王易朋/master
......@@ -538,10 +538,3 @@ USB设备消息传输通道,用于确定设备。
| -------- | -------- | -------- |
| USB_REQUEST_DIR_TO_DEVICE | 0 | 写数据,主设备往从设备。<br>**系统能力**: SystemCapability.USB.USBManager |
| USB_REQUEST_DIR_FROM_DEVICE | 0x80 | 读数据,从设备往主设备。<br>**系统能力**: SystemCapability.USB.USBManager |
| 名称 | 默认值 | 说明 |
| -------- | -------- | -------- |
| NONE | 0 | 无。<br>**系统能力**: SystemCapability.USB.USBManager |
| ACM | 1 | 串口设备。<br>**系统能力**: SystemCapability.USB.USBManager |
| ECM | 2 | 网口设备。<br>**系统能力**: SystemCapability.USB.USBManager |
| HDC | 4 | HDC设备。<br>**系统能力**: SystemCapability.USB.USBManager |
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