| 摘要 |
An electrographic sensor unit includes a layer of a conductive material having an electrical resistivity and a surface, at least three spaced apart contact points (12, 14, 16) electrically interconnected with a layer of conductive material, a processor (30) connected to the spaced apart contacts, and a stylus (20) of a flexible conductive layer, coupled to the processor with the stylus disposed to be positioned by a user in vicinity of a user selected position on the surface of the layer.
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