How does DXF import work in Nonio C?

How does DXF import work in Nonio C? Nonio C imports single points,  polygons (in DXF Polyline), faces, which it inserts as points to eventually be united by breaklines. It does not import other elements, such as lines, text, circles, etc. The primary use of DXF importation in Nonio C is to import contour lines…

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