ISO 10303-214:2010(E)
A Conical_surface is a surface that can be produced by revolving a line in three-dimensional geometric space about any intersecting line as rotation axis. The angle between the axis and the revolved line shall be between and not equal to 0 and 90 degrees. A Conical_surface shall be trimmed to a finite extension if used in a Surface_model or a Geometrically_bounded_surface_model.
A Conical_surface is a type of Surface.
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