long-distance backbone network
long-distance backbone network
长途骨干网
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Combined with topologies of major telecom operators' transmission networks of long -distance backbone transmission networks in China, it analyzes its network protection solution.
结合目前我国长途骨干传输网上主要电信运营商的传输网络的网络拓扑现状，对其网络保护方案进行了分析。
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