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USB接口以其最高12Mbps的传输速率及最高可支持127个设备的优异能力,从1995年诞生起至今越来越受到用户的欢迎,并已经成为PC的标准配置。然而,尽
USB interface with its maximum transfer rate of 12Mbps and up to 127 devices capable of supporting the excellent ability, since its inception in 1995 has been more and more users, and has become the standard PC. However, do it