借助这种网络图，许多工程网络图，如：电力输送网，交通运输网等等都可以精确描述。

By means of the network graph, a large number of engineering network graphs, such as electricity power distribution and transportation networks may be described accurately.

通风网络图是矿井通风管理的一种重要图件。

Ventilation network graph is one kind of important graphic document of the mine ventilation management.

根据网络技术在工程机械修理工作中的应用实践，提出了网络图的编绘方法和技巧；

Based on the application practice of network chart in repair work of construction machinery, a programming method and hints for network chart are offered.