| 摘要 |
A baseball home plate with laser beams arrangement is disclosed. The home plate has laser assemblies disposed along its edges emitting laser beams in the vertical direction. When a baseball thrown by a pitcher crosses over a path with one of the laser beams, the baseball is illuminated by a distinct laser spot. This permits an umpire to easily determine whether or not the baseball laterally passed through the strike zone and call the pitch a ball or a strike accordingly.
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