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The ornamental design for an electronic toothbrush, as shown and described. |
FIG. 1 is a bottom plan view of an electronic toothbrush showing my new design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is an elevational view of the opposite side thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a front end elevational view thereof;
FIG. 6 is a rear end elevational view thereof; and,
FIG. 7 is a perspective view thereof.
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