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Franzis Bat Detector Kit
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Build a Simple Bat Detector
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Bat Detectors
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Franzis Bat Detector Kit
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Franzis Make your own Bat Detector Kit & Manual: Amazon.co.uk: Franzis Verlag GmBH: 9783645652766: Books
Franzis Bouwpakket Vleermuisdetector 6-delig | bol.com
Franzis Bat Detector Kit
