Ventilation network graph is one kind of important graphic document of the mine ventilation management.
通风网络图是矿井通风管理的一种重要图件。
The ventilation network graph is one of the important drawings in the ventilation management of the coal mines.
矿井通风网络图是矿井通风管理的重要图件之一，也是进行矿井通风系统模拟、网络解算、通风系统优化的基础资料。
In essence, 3d ventilation network graph is a 'figurative' ventilation network graph, and it surpasses the technical level of the conventional planar network graph.
从本质上说，3d风网图表达的是“具象”的通风网络图，它超越了传统平面网络图的技术层面。
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