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The ornamental design for an alarm system control unit, substantially as shown. |
FIG. 1 is a front, top and left side perspective view of a cabinet for a combined receiver and alarm control unit showing my new design;
FIG. 2 is a top plan view thereof.
FIG. 3 is a bottom plan view thereof.
FIG. 4 is a front elevational view thereof.
FIG. 5 is a right side elevational view.
FIG. 6 is a rear elevational view thereof.
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