A n_ _ - m_ _ _ _ _ _ _ model provides detailed surfaces and edges within a solid model, in addition to the bordered surfaces.

The answer to your question is "nurbs - mesh."

A Non-Uniform Rational B-Spline (NURBS) model is a mathematical representation that can accurately describe curves and surfaces. NURBS are especially effective in computer-aided design (CAD) for modeling complex shapes, providing a high level of detail through their ability to represent both analytical shapes (like circles and ellipses) and freeform shapes.

A mesh model, on the other hand, is constructed from a collection of vertices, edges, and faces, which can represent a solid in three dimensions but may not inherently provide the smooth surfaces that NURBS can. Together, NURBS and mesh models are often used in 3D modeling and computer graphics to achieve detailed representations of objects.

This combination of NURBS with mesh enhances the capability to create intricate geometries while maintaining precision in modeling surfaces and edges, which is particularly useful in fields like engineering, animation, and industrial design.