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  2. HC-12a - Wikipedia

    en.wikipedia.org/wiki/HC-12a

    HC-12a, also called ES-12a, OZ-12a, DURACOOL 12a [1] and Hydrocarbon Blend B, is marketed as a "drop-in" replacement refrigerant for R-12 and other refrigerants. HC-12a is a mixture of hydrocarbons, specifically propane (R-290) and isobutane (R-600a), and is therefore considered nearly non-ozone-depleting. The hydrocarbon blend is compatible ...

  3. 85 mm air defense gun M1939 (52-K) - Wikipedia

    en.wikipedia.org/wiki/85_mm_air_defense_gun_M...

    However, the new T-34/85's turret had been designed to accommodate the already-available D-5 gun, and did not mate properly with Grabin's gun. The T-34/85 tank went into production making use of the D-5 gun (designated D-5T, for "tank"). Savin was put to work modifying Grabin's gun to fit the new turret and incorporate other improvements.

  4. Tube (container) - Wikipedia

    en.wikipedia.org/wiki/Tube_(container)

    [4] [5] Aluminum tube caps and closures are generally threaded, as is the nozzle. Aluminium tubes generally have the far end folded several times after the contents have been added. The tube is typically hermetically sealed and nearly germ-free due to the high temperatures during the production process. The inside of the tube can be coated to ...

  5. Mazda Wankel engine - Wikipedia

    en.wikipedia.org/wiki/Mazda_Wankel_engine

    The 12A is an "elongated" version of the 10A: the rotor radius was the same, but the depth was increased by 10 mm (0.39 in) to 70 mm (2.8 in). It continued the two-rotor design; with the depth increase each chamber displaced 573 cc (35.0 cu in) so two chambers (one per rotor) would displace 1,146 cc (69.9 cu in); the series name continues ...

  6. Lockheed YF-12 - Wikipedia

    en.wikipedia.org/wiki/Lockheed_YF-12

    The Lockheed YF-12 is an American Mach 3+ capable, high-altitude interceptor prototype, developed and manufactured by American aerospace company Lockheed Corporation.. The interceptor was developed during the late 1950s and early 1960s as a potential replacement for the F-106 Delta Dart interceptor for the United States Air Force (USAF).

  7. Foot (unit) - Wikipedia

    en.wikipedia.org/wiki/Foot_(unit)

    The Egyptian equivalent of the foot—a measure of four palms or 16 digits—was known as the djeser and has been reconstructed as about 30 cm (11.8 in). The Greek foot (πούς, pous) had a length of ⁠ 1 / 600 ⁠ of a stadion, [12] one stadion being about 181.2 m (594 ft); [13] therefore a foot was, at the time, about 302 mm (11.9 in). Its ...

  8. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    Determination of the rod, using the length of the left foot of 16 randomly chosen people coming from church service. Surveyors in the United States continue to use: chain (22 yards, or 20.1168 m) rod (also called pole or perch) (quarter of a chain, 5 1 ⁄ 2 yards, or 5.0292 m)

  9. R-77 - Wikipedia

    en.wikipedia.org/wiki/R-77

    Compared to all newer variants this missile has a reduced maximum range of 80 kilometres (50 mi) with 22.5 kg warhead. [ 2 ] R-77-1 ( izdeliye 170-1) – Russian-built variant with a streamlined nose, 9B-1248 ( Izdeliye-50-1 ) active radar seeker head, and new fins.