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Tethered balloon measurement system | Institute of Combustion and Power Plant Technology | University of Stuttgart
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File:Camille Grávis, Captive balloon with clock face and bell, floating above the Eiffel Tower, Paris, France.jpg - Wikimedia Commons
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GUADIX, GRANADA, SPAIN. FEBRUARY 1ST. Captive balloons in Aeroestacion Festival stock photo (199718) - YouWorkForThem
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