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