close pole with dutch acoustic air alarm system also known raid siren alert |
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| navigate by keyword : circle line light sunlight blue background sky technology city white modern europe safety electronic air netherlands system solar electric war signal siren defense outdoor holland danger civil emergency alarm pole raid western federal hague den haag high modulator warning international population alert close aware luchtalarm public national panel loud nederland cloudy citizens |
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| Close up of pole with Dutch acoustic air alarm system also known as air raid siren alert aka luchtalarm in Dutch with cloudy sky in Holland used to warn public for example during war or attack |
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