11. Note that points on opposite sides of the reference line are displaced in opposite directions. 12. Angle of attack is the angle between the body's reference line and the oncoming flow. 13. Momentum Index : Its short-term momentum index is currently trading below its neutral reference line . 14. This can be accomplished using reference lines , envelope methods, digital filters, fractals or other techniques. 15. Momentum Index : Its short-term momentum index staged a re-penetration of its neutral reference line . 16. Doolittle's flight demonstrated the value of a fixed radio beam in space as a reference line . 17. Now I am trying to see how to make my references nest under the references line . 18. For example in the reference line of a letter you would see " letter of " even" 19. If the reference line " L " is perpendicular to the plane, one obtains the usual reflection. 20. Ancient Egyptian artists used vertical and horizontal reference lines to maintain the correct proportions in their work.
