Category:Systems that use Biersach & Niedermeyer sirens
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This category contains articles pertaining to siren systems that use Biersach & Niedermeyer sirens.
See also
- Systems that use ACA sirens (B&N's siren business was split off into ACA in 1967)
- Systems that use ASC sirens (ACA evolved into ASC in the mid-1990s)
Pages in category "Systems that use Biersach & Niedermeyer sirens"
The following 2 pages are in this category, out of 2 total.