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- This category contains articles pertaining to siren systems in Europe. ...1 member (0 subcategories, 0 files) - 01:30, 24 July 2016
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- ...rt, or ''Go indoors'' signal, utilizes the Indoor Protection tone from the European tone set, while the all clear, or ''Danger is over'' signal, utilizes the A ...tems]][[Category:European systems]][[Category:National systems]][[Category:Systems that use Whelen sirens]] ...1 KB (207 words) - 01:32, 24 July 2016