本文主要讨论我国电信网中程控交换局时钟频率维护周期的确定问题。
This article mainly addresses the maintenance period of clock frequency of SPC exchanges in China's telecommunication network.
本文主要讨论我国电信网中程控交换局时钟频率维护周期的确定问题。
This article mainly addresses the maintenance period of clock frequency of SPC exchanges in China's telecommunication network.
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