The necessity and conditions needed of developing specialized GIS for underground gas pipe network system are also expounded.
近年来地理信息系统（GIS）技术不断成熟，为燃气管网规范化、自动化、科学化的管理创造了条件。
On the basis of theory discussion, USES package development and API function development approach, combines coal gas pipe network administrative system make network analysis realize VB procedure.
在理论探讨的基础上，运用组件开发和API函数开发方法，结合煤气管网管理系统作了系统分析和VB程序实现。
The fault diagnosis system of natural gas pipe network based on GIS is composed of the basic function subsystem, comprehensive analysis subsystem and fault diagnosis subsystem.
基于GIS的天然气管网故障诊断系统由基本功能子系统、综合分析子系统以及故障诊断子系统组成。
The article summarizes main points of electronic identification system designing in gas pipe network by introducing constitutes, working principle, and characteristics.
文章通过电子标识系统的组成、工作原理、特征介绍，总结了电子标识系统在燃气管网设计上的要点。
The article summarizes main points of electronic identification system designing in gas pipe network by introducing constitutes, working principle, and characteristics.
文章通过电子标识系统的组成、工作原理、特征介绍，总结了电子标识系统在燃气管网设计上的要点。
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