... 平面筛分机 plan sifter 平面图 a plan; a planar graph; a plane figure 平面图形 a plane figure ...
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Trapezoidal no volume! It is a planar graph!
梯形没有体积！它是一个平面图形！
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。
Secondly, we investigate the list coloring of planar graphs, and give a su? Cientcondition for a planar graph being 3-choosable.
其次，文章研究了平面图的列表着色问题，给出了平面图3 -可选的一个充分条件。
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