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The ornamental design for a tester for testing christmas tree light bulbs and sockets, as shown |
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FIG. 1 is a front elevation of a tester for testing christmas tree light bulbs and sockets showing my new design;
FIG. 2 is a left side elevation thereof;
FIG. 3 is a rear elevation thereof;
FIG. 4 is a right side elevation thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a top plan view thereof.
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