Contour Flange command
Use the Contour flange command 
to construct a contour flange by extruding a profile that represents the edge of the contour flange.
Creating a contour flange in the context of an assembly
When in place activated into a synchronous sheet metal document, a contour flange can be created from a chain of edges from adjacent parts. The contour flange must be the first feature in the sheet metal document.
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