The second part discussed the theoretical knowledge and data models of DGNDBS; studied the feature, work model and main technique of the network database system.
第二部分从理论上讨论了动力大地测量网络数据库系统的基础知识和数据模型，研究了网络数据库系统的特点、工作模式以及主要技术。
It mainly narrated the sense for testing the lifting load of main shaft, the testing principle of the technique, approach for processing the testing data etc.
主要阐述了主井箕斗提升载荷的测试意义、此种测试技术的测试原理、测试数据处理方法等。
This paper study the technique gist, data collection and preparation, quality check and main problems of constructing county or city soil utilization database taking MAPGIS software as example.
本文以MAPGIS土地利用数据库建库软件为例，研究建立县（市）级土地利用数据库的技术依据、资料收集及预处理、建库流程、质量检查及主要问题的处理方法。
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