The function of the USB module is to input some data from a USB mobile media where the signal of WLAN is not received.
考虑到有些场合没有无线网络的信号时，可以通过可移动USB介质导入一些静态数据到系统中；
The function of the USB module is to input some data from a USB mobile media where the signal of WLAN is not received.
考虑到有些场合没有无线网络的信号时，可以通过可移动USB介质导入一些静态数据到系统中；
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