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 | The ornamental design for a ruler, substantially as shown and described. | |||||||||||||||||
FIG. 1 is a top left perspective view of a ruler showing my new design;
FIG. 2 is a left end elevational view thereof;
FIG. 3 is a front elevational view thereof, the rear being a mirror image thereto;
FIG. 4 is a right end elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof.
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