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2. Eco-Drive - Wikipedia

   en.wikipedia.org/wiki/Eco-Drive

   Later specialized tool watch designs were introduced like the Promaster Eco-Drive Professional Diver 1000M Titanium BN7020-09E in 2017. This is a very large watch, the titanium watch case has a diameter of 52.2 mm and thickness of 22 mm and features a helium release valve, designed for mixed gas saturation diving at great depths. [6] [7] [8]

3. Citizen Watch - Wikipedia

   en.wikipedia.org/wiki/Citizen_Watch

   Eco-Drive watches use a battery recharged by a solar panel hidden under the watch face. In the rare and discontinued Eco-Drive Duo series, the solar power was supplemented by an automatic quartz power source. One early model, called the Citizen Vitality, used the watch hands to drive a small electric generator, but was discontinued following ...

4. List of Douglas A-4 Skyhawk operators - Wikipedia

   en.wikipedia.org/wiki/List_of_Douglas_A-4...

   Withdrawn from use 1983). Ten aircraft lost in crashes. During the A-4G Skyhawk era the Squadron was designated VF-805 conforming with USN squadron designations. The 'VF' signaled the Fleet Defense role of the Skyhawk. V=Fixed Wing, F=Fighter. Over the life of the aircraft there were a number of different squadron aircraft paint schemes. [3]

5. Titanium - Wikipedia

   en.wikipedia.org/wiki/Titanium

   The processing of titanium metal occurs in four major steps: reduction of titanium ore into "sponge", a porous form; melting of sponge, or sponge plus a master alloy to form an ingot; primary fabrication, where an ingot is converted into general mill products such as billet, bar, plate, sheet, strip, and tube; and secondary fabrication of ...

6. Cessna 172 - Wikipedia

   en.wikipedia.org/wiki/Cessna_172

   For the first time, the Skyhawk name was applied to an available deluxe option package that included optional wheel fairings, avionics, and a cargo door along with full exterior paint rather than partial paint stripes. The Skyhawk was also powered by an O-300-D in place of the O-300-C of the standard model. 989 built. [11] [17] [18] [19] 172C

7. Lockheed F-117 Nighthawk - Wikipedia

   en.wikipedia.org/wiki/Lockheed_F-117_Nighthawk

   F-117 Nighthawk F-117 flying over mountains in Nevada in 2002 General information Type Stealth attack aircraft National origin United States Manufacturer Lockheed Corporation Status Retired from combat, used as training aircraft as of 2025 Primary user United States Air Force Number built 64 (5 YF-117As, 59 F-117As) History Introduction date October 1983 ; 41 years ago (1983-10) First flight ...