| 摘要 |
A light board includes a translucent support defining a support surface thereon, and an alignment pattern generator is located adjacent the support for establishing an alignment pattern. The alignment pattern generator includes a number of light-emitting elements. A photo duplicating device may be provided for duplicating a layout aligned on the alignment patter. The light board may be incorporated into a "photocopy machine." The light board may likewise be used as a light table, and the like.
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