备份
https://blog.csdn.net/dragon101788/article/details/30477679
XModem -发送端源代码(Python语言实现)
https://download.csdn.net/download/lifutian/1928327
备份
https://blog.csdn.net/dragon101788/article/details/30477679
https://download.csdn.net/download/lifutian/1928327