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Typical Applications Include Climate Control And Personal Thermal Comfort (e.g., An Electric Table Or Floor Fan), Vehicle Engine Cooling Systems (e.g., In Front Of A Radiator), Machinery Cooling Systems (e.g., Inside Computers And Audio Power Amplifiers), Ventilation, Fume Extraction, Winnowing (e.g., Separating Chaff Of Cereal Grains), Removing Dust (e.g. Sucking As In A Vacuum Cleaner .