Because the reliability of UDP protocol is not well, the author design a protection-mechanism of reliability transmission which is going on from networking IC card terminal units to PC.
针对UDP协议传输的不可靠性，作者设计了从网络读卡器端和网络服务器端同时进行可靠性传输的保证机制。
Because the reliability of UDP protocol is not well, the author design a protection-mechanism of reliability transmission which is going on from networking IC card terminal units to PC.
针对UDP协议传输的不可靠性，作者设计了从网络读卡器端和网络服务器端同时进行可靠性传输的保证机制。
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