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2. Split-flap display - Wikipedia

   en.wikipedia.org/wiki/Split-flap_display

   The Signaltron main departure board at Praha-Smíchov station, Czech Republic (2012), manufactured by Pragotron Schematic of a split-flap display in a digital clock display An animation of how a split-flap display works Flap departure board at Gare du Nord, Paris (2007) Section of a split-flap display board at Frankfurt (Main) Hauptbahnhof (2005) Enlarged inner workings of a split-flap clock

3. Counter display unit - Wikipedia

   en.wikipedia.org/wiki/Counter_Display_Unit

   These types of display stands are principally fabricated from printed corrugated board, acrylic, sheet metal, steel wire, vacuum formed plastic and wood or indeed a combination of more than one of these materials. Choice of material is often dictated by the length of time the display unit will be in store.

4. Williams F112 - Wikipedia

   en.wikipedia.org/wiki/Williams_F112

   An F112 engine on display at the National Museum of the United States Air Force: Type ... Type: twin-spool counter-rotating turbofan; Length: 29.5 in (750 mm)

5. Electronic flight instrument system - Wikipedia

   en.wikipedia.org/wiki/Electronic_flight...

   The display unit that replaces the artificial horizon is called the primary flight display (PFD). If a separate display replaces the HSI, it is called the navigation display. The PFD displays all information critical to flight, including calibrated airspeed, altitude, heading, attitude, vertical speed and yaw. The PFD is designed to improve a ...

6. Flip-disc display - Wikipedia

   en.wikipedia.org/wiki/Flip-disc_display

   The flip-disc display (or flip-dot display) is an electromechanical dot matrix display technology used for large outdoor signs, normally those that will be exposed to direct sunlight. Flip-disc technology has been used for external destination signs on buses and trains across North America , Europe and Australia , as well as for variable ...

7. Volumetric display - Wikipedia

   en.wikipedia.org/wiki/Volumetric_display

   A volumetric display device is a display device that forms a visual representation of an object in three physical dimensions, as opposed to the planar image of traditional screens that simulate depth through a number of different visual effects. One definition offered by pioneers in the field is that volumetric displays create 3D imagery via ...