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The ornamental design for a plumbing cap lock, as shown and described. |
FIG. 1 is an environmental perspective view of a plumbing cap lock showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a left side elevational view with the right side view and the rear view being mirror images thereof; and,
FIG. 5 is a bottom view thereof.
The broken line partial showing of a urinal in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.
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