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The ornamental design for a guitar practice device, as shown. |
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FIG. 1 is a front perspective view of a guitar practice device in accordance with this invention;
FIG. 2 is a rear view of the guitar practice device of FIG 1;
FIG. 3 is a right end view of the guitar practice device of FIG. 1;
FIG. 4 is a left end view of the guitar practice device of FIG. 1;
FIG. 5 is a top view of the guitar practice device of FIG. 1; and,
FIG. 6 is a bottom view of the guitar practice device of FIG. 1.
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