| 摘要 |
The device has a number of lasers on a movable electrically disturbed underlay and arranged at angles so that their beams intersect in the air in front of the lasers to form a focal point that can be moved back and forth by varying the angle between the lasers. Air molecules incident at the focal point are slightly braked. Various figures can be described with the focal point, e.g. a section of an automobile, aircraft, ship or tractor.
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