extract curve and project curve

Curve operation in Unigraphics NX5 is very interesting,because it easy to operate as our need, EXTRACT CURVE first let's learn about extract curve, From the edge of the face may sometimes be necessary to draw a line, if the face is a connection between two or more face we do not need to draw it, use the extract face an easier way.in the figure below, we need a line that curved to explain about partings line (mold design).  The first step is to click the icon extract the curve, the shape iconya like the image below, if the icon is missing, to appear in the toolbar curve and curve editing.    after clicking the...

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