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京汉广、长沙—南宁光缆通信扩容工程合同签字由邮电部设计院设计的北京一武汉一广州２．５（爿）１１。。ＳＤＨ光缆通信干线和长沙一南宁２．５（ｉｂｌｔ／。ＳＤＨ架空光缆通信干线扩容工程引进八ｎＴ光传输设备签字仪式于１９０６年３月７日在北京举行。这两项工程于...
Beijing and Guangzhou Guang, Changsha - Nanning optical cable communications expansion project contract signed by the Ministry of Posts and Telecommunications Design Institute of Beijing a Wuhan a Guangzhou 2.5 (爿) 11. . SDH optical fiber communication trunk and Changsha a Nanning 2.5 (iblt / SDH overhead optical cable communication trunk expansion project to introduce eight nT optical transmission equipment signing ceremony was held in Beijing on March 7, 1906. These two projects in ...