The shape of cross-section is an ellipse folded in half through one symmetry axis, and the axis keeps perpendicular with pinacoid-view.
断面形
对称轴对折的椭圆，此对称轴始终垂直于轴截面，其方向与平面图上的
道中线无关。
The shape of cross-section is an ellipse folded in half through one symmetry axis, and the axis keeps perpendicular with pinacoid-view.
断面形对称轴对折的椭圆，此对称轴始终垂直于轴截面，其方向与平面图上的道中线无关。
The drawing method for the double channel impeller is studied.It is found that there is an in-conformity between the dimensions of plane-view and pinacoid-view of fluid cross-section.
摘要研究了双道污水泵叶轮常用的图纸表达方法，发现平面图上的断面投影结果与轴面图中确定的断面形尺
致的问题。
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