public StepEllipse(string name, StepAxis2Placement position, double semiAxis1, double semiAxis2)
: base(name)
{
Position = position;
SemiAxis1 = semiAxis1;
SemiAxis2 = semiAxis2;
}
public StepCircle(string label, StepAxis2Placement position, double radius)
: base(label)
{
Position = position;
Radius = radius;
}