Based on summary and analysis of the actual conditions of post enterprises, this paper proposes two models of making time limit standard for mail transmission.
本文从总结和分析邮政企业的实际情况出发，探讨了制定邮件传递时限标准的两种模式。
Thus, rationally deciding time limit standard for mail transmission has become the first problem mutually cared by post enterprises and consumers.
因此，合理确定邮件的传递时限标准，也就成为邮政企业和用户共同关心的首要问题。
According to request of real time and reliability in national protective relaying signals transmitting standard, the paper discusses how to reduce transmission delay and bit error ratio.
根据国家颁布的继电保护通道标准中对实时性、可靠性方面的要求，重点讨论了如何改善传输时延和误码性能。
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