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ARB- Arbitrary Polyhedron. There can be 4, 5, or 6 faces.
BOX-Box. The edges are mutually perpendicular at each corner. The faces are not necessarily aligned with the Cartesian directions.
ELL-Ellipsoid. The length and orientation of the 3 mutually orthogonal principal axes are arbitrary.
RCC-Right Circular Cylinder. The circular end faces are perpendicular to the axis of symmetry.
RPP-Rectangular Parallelepiped. All sides are each parallel to one of the Cartesian axes, and opposite faces are equal.
SPH-Sphere.
TRC-Truncated Right Angle Cone. The circular end faces are perpendicular to the axis of symmetry.
TABCL-Tabular Cylinder or Tabular Extrusion. The cylinder-like face is a closed curve consisting of straight line segments and circular arcs.
TABSF-Tabular Surface of Revolution. Each point is described by its distances along and perpendicular to the axis of symmetry.
WED-Right Angle Wedge. The edges are mutually orthogonal at 2 of the corners.