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