| http://www.w3.org/ns/prov#value | - The mouse pad of claim 5, wherein said opening is a notch that extends inward from an edge of said first piece, and said second piece has an additional portion adjacent said projection, and said additional portion is a partial mirror image of said projection, and said additional portion is selectively inserted into said notch to cooperate with said arcuate edge in bordering a circular hole in the
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