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"

This category contains only the following page.

M

Memphis

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