这个议题的内容是关于USB Device的标准，根据USB规范，USB Device被分成很多的device class，涉及到人机接口、打印机、图象、大容量存储等方面的内容。这里的USB Device Class是Smart Card(智

Packet : USB_SMART_CARD标准研究中期060818.rar filelist
USB_SMART_CARD标准研究中期060818.ppt

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