21. The floor of the dock is thick at the centre line , tapering to thick at the sides. 22. The centre lines saw the heaviest fighting. 23. After each goal, the non-scoring team restarts the game, with a face off on the centre line . 24. The ball is placed one metre in front of Worms along the centre line of the canvas. 25. They positioned the rotor hub directly over the wing centre line and behind the centre of gravity. 26. The combination of Healey, Thorold Merrett and Bill Twomey, Jr ., gave Collingwood a lethal centre line . 27. The seeker provides information on the deviation of the laser sport from the centre line of the detector. 28. Wires were suspended down each shaft from which the centre line was determined by means of a theodolite. 29. In August, Gaston led part of the centre line of the crusader army at the Battle of Ascalon. 30. The windows are filled with 4 coloured lead lights, 3 of which pivot along the horizontal centre line .
