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2. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   Ceiling fans were proven to have a more significant effect on the droplet and airborne transmission when the coughing infected person is located directly under the ceiling fan. Ceiling fans offer better protection from cough exposure for people located closer to the fan center, where the directed airflow changing particle trajectory downward to ...

3. High-volume low-speed fan - Wikipedia

   en.wikipedia.org/wiki/High-volume_low-speed_fan

   A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."

4. 81-720/721 - Wikipedia

   en.wikipedia.org/wiki/81-720/721

   The automated train control system "Vityaz-1" was developed by JSC Tikhomirov Scientific Research Institute of Instrument Design. In 1993, at the Polezhaevskaya subway station, Russian President Boris Yeltsin, Prime Minister V.S. Chernomyrdin, and Moscow Mayor Yuri Luzhkov attended the ceremony marking the debut of the new trains, consisting of 81-720 (lead) and 81-721 (intermediate) cars ...

5. Outstanding Winners Of The 2024 International Design ... - AOL

   www.aol.com/lifestyle/outstanding-winners-2024...

   The dark mirror-finish stainless steel ceiling enhances the sense of height and depth, drawing viewers into a winding, bizarre valley. As one explores the varying widths and light levels, it feels ...

6. Home appliance - Wikipedia

   en.wikipedia.org/wiki/Home_appliance

   Proceedings of the 2012 International Conference of Modern Computer Science and Applications. Advances in Intelligent Systems and Computing. Springer. pp. 522– 528. ISBN 978-3-642-33030-8. Kriske, Rob; Kriske, Mary (July/August 1984). "Home Appliance Repair". Mother Earth News. Accessed May 2015.

7. Kitchen hood - Wikipedia

   en.wikipedia.org/wiki/Kitchen_hood

   A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [ 1 ]