//public GsaSpring(Double6 double6)
        //{
        //    m_x = double6.X;
        //    m_y = double6.Y;
        //    m_z = double6.Z;
        //    m_xx = double6.XX;
        //    m_yy = double6.YY;
        //    m_zz = double6.ZZ;
        //}


        public GsaSpring Duplicate()
        {
            if (this == null)
            {
                return(null);
            }
            GsaSpring dup = new GsaSpring
            {
                X  = m_x,
                Y  = m_y,
                Z  = m_z,
                XX = m_xx,
                YY = m_yy,
                ZZ = m_zz
            };

            return(dup);
        }