Claims (1)
Claim 1 (Independent)
The ornamental design for a plumb line, as shown and described.
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FIG. 1 is a top plan view of a plumb line showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is an elevational view taken from the right-hand side of FIG. 2 ;
FIG. 5 is an elevational view taken from the left-hand side of FIG. 2 ;
FIG. 6 is a top perspective view of the plumb line of FIG. 1 .; and,
FIG. 7 is a bottom perspective view of the plumb line of FIG. 1 .