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The ornamental design for a dumbbell, as shown and described. |
FIG. 1 is a perspective view of a dumbbell showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a right side elevational view thereof, the side opposite being a mirror image;
FIG. 7 is another right side elevational view thereof with portions of the side wall broken away;
FIG. 8 is a cross-sectional view thereof taken along line 8--8 in FIG. 6; and,
FIG. 9 is a perspective view of a modified embodiment of the design shown in FIGS. 1 through 8.
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