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北京市防汛集群通信系统是２０世纪９０年代初利用芬兰政府贷款建设的京密引水技术改造工程的一部分。该通信系统由引进芬兰ＮＯＫＩＡ电信公司的模拟集群系统Ａｃｔｉｏｎｅｔ Ⅱ构成，１９９２年１２月安装完毕，１９９３年４月正式投入试运行。 北京市水利集群通信系统由微?
Beijing flood control cluster communications system is part of the Jingmi diversion project that was constructed by the Finnish government in the early 1990s. The communication system is composed of Actionet Ⅱ, an analog cluster system introduced by Finland NOKIA Telecom Company. It was installed in December 1992 and put into trial operation in April 1993. Beijing water conservancy cluster communication system from micro?