Graph plotting part consists of histogram, cross section drawing, clustering spectral pattern, 2-dimensinoal factor scattergram.
图形绘制包括：直方图、因子平面散点图、聚类谱系图、剖面图。
Increase length, decrease cross-section, called drawing out the metal.
增加长度、减小横截面，称为延伸金属。
It is put forward in this article that the cross section deformation index Q can be used to evaluate the inhomogeneity of deformation in tube drawing.
为评价管材拉拔中的不均匀变形，提出用管材拉拔前后截面形状变化指数Q描述截面变形的不均匀性。
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