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The ornamental design for a dental handpiece, as shown. |
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FIG. 1 is a front, left-end and top perspective view of a dental handpiece, showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right end view thereof;
FIG. 5 is a left end view thereof; and,
FIG. 6 is a bottom plan view thereof.
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