Category:HPSS

**HPSS**
	series of outdoor warning siren models manufactured by ATI Systems
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Instance of	model series (civil defense siren model);
Subclass of	electronic siren; omnidirectional siren;
Manufacturer	ATI Systems;
Authority file
	Q77388310;
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Subcategories

This category has the following 2 subcategories, out of 2 total.