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信息基础设施建设取得显著成效。基本建成了以光纤通信为地面骨干传输网络、卫星通信为空间通信主体、数字微波为有效补充的现代化通
Significant results have been achieved in the construction of information infrastructure. Basically built with optical fiber communications backbone transmission network for the ground, satellite communication is the main body of space communications, digital microwave is an effective supplement of the modern pass