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4. Precised calculation of derivatives of surface of revolution is implemented for the points of surface placed on the axis of revolution (Geom_SurfaceOfRevolution.cxx) 5. Small modifications are made to adjust algorithms to new behavior of B-spline calculation. 6. Test cases were modified according to the modern behavior. 7. Changes in BRepLib_CheckCurveOnSurface to use adaptors instead of geometric entities 9. Added methods to access directly poles, knots, multiplicities of BSpline curves and surfaces