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The ornamental design for an alarm unit, as shown and described. |
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FIG. 1 is the perspective view of an alarm unit showing my new design;
FIG. 2 is the front elevational view thereof;
FIG. 3 is the rear elevational view thereof;
FIG. 4 is the left side elevational view thereof;
FIG. 5 is the right side elevational view thereof;
FIG. 6 is the top plan view thereof; and,
FIG. 7 is the bottom plan view thereof.
FIG. 8 is a perspective view of a second embodiment thereof, wherein the only difference exist in the addition of a mounting bracket.
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