| 摘要 |
A placido device 10 includes a single-curvature, semi-circular screen 12 having an opaque covering which is interrupted along its surface to form an illuminated pattern. A flat top 14 is attached to the top of the screen 12 and angled from the screen front 28 towards the screen bottom 26. Also, a flat bottom 16 is attached to the bottom of the screen 12 and angled from the screen front 28 towards the screen top 24.
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