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一、前言随着我国国民经济的发展和国防建设的需要,原有海底电缆不仅在通信容量上而且在传输距离上都已不能满足日益发展的要求。这就需要发展120路海缆系统,以建立沿海大城市
I. Introduction With the development of China’s national economy and the need of national defense construction, the original submarine cables can no longer satisfy the ever-increasing requirements not only in terms of communication capacity but also in transmission distance. This requires the development of 120 submarine cable systems to build coastal cities