| Enumerator | 
|---|
| StepGeom_bssfPlaneSurf  |  | 
| StepGeom_bssfCylindricalSurf  |  | 
| StepGeom_bssfConicalSurf  |  | 
| StepGeom_bssfSphericalSurf  |  | 
| StepGeom_bssfToroidalSurf  |  | 
| StepGeom_bssfSurfOfRevolution  |  | 
| StepGeom_bssfRuledSurf  |  | 
| StepGeom_bssfGeneralisedCone  |  | 
| StepGeom_bssfQuadricSurf  |  | 
| StepGeom_bssfSurfOfLinearExtrusion  |  | 
| StepGeom_bssfUnspecified  |  |