Category:Modulator sirens

**Modulator**
	series of civil defense siren models manufactured by Federal Signal Corporation
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	Wikipedia
Instance of	model series (civil defense siren model);
Subclass of	electronic siren; omnidirectional siren;
Manufacturer	Federal Signal Corporation;
Authority file
	Q5440437;
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Subcategories

This category has only the following subcategory.

The following 2 files are in this category, out of 2 total.