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水准网系统的建立,是大地测量的最重要的成果,是国民经济各项建设的必需依据之一。水利工作更是离不开准确的水准网系统。目前淮河流域的水准网仍是解放初期为适应大
The establishment of a leveling network system is the most important result of geodetic surveying and one of the necessary foundations for the construction of the national economy. Hydraulic work is inseparable from the accurate leveling network system. The current level of the Huaihe River Basin is still adapted to the early liberation