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Tiefpass Frequenzantwort.svg Frequenzantwort eines Tiefpasses own Benutzer Berger Zittau User Berger Zittau Berger Zittau Original upload log de Wdwdbot CommonsHelper de TiefpassFrequenzantwort svg Frank Murmann bytes Frank Murmann bytes no Information Frequenzantwort eines Tiefpasses selbst erstellt Vorlage Bitmap