Power system communication automatic exchange system is one of the largest dedicated phonetic communication network in China, which plays a tremendous role.
电力系统自动交换网作为国内最大的专用语音通信网之一，发挥着巨大的作用。
Power system communication automatic exchange system is one of the largest dedicated phonetic communication network in China, which plays a tremendous role.
电力系统自动交换网作为国内最大的专用语音通信网之一，发挥着巨大的作用。
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