Trapezoidal no volume! It is a planar graph!

梯形没有体积！它是一个平面图形！

Most of the two-dimensional models that manage topology are based on the planar graph theory.

大多数操作拓扑结构的二维模型都是基于平面理论的。

Construction operations must strict be abided by the planar graph approved by the firefighting department .

展台搭建单位应依据消防管理部门批准的平面图施工。

Using this method can be based on signal spectral analysis method of fault diagnosis into a planar graph recognition.

利用该方法可以将基于信号频谱分析的故障诊断方法转化为平面图形的识别。

As for the ramp engineering, the author put forward the difference incremental algorithms for the planar graph gradients.

针对斜坡道工程，提出平面图形梯度差值生长构建算法；