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  2. Waveguide (radio frequency) - Wikipedia

    en.wikipedia.org/wiki/Waveguide_(radio_frequency)

    In radio-frequency engineering and communications engineering, a waveguide is a hollow metal pipe used to carry radio waves. [1] This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave ...

  3. Archambault A31 - Wikipedia

    en.wikipedia.org/wiki/Archambault_A31

    The design has a hidden swim ladder mounted in a transom tube. The mainsheet has a 9:1 mechanical advantage, while the adjustable backstay is 8:1. The Ronstan mainsheet traveller is located aft of the tiller. The boat has a lifting bridle that exits through an inspection port for crane launching. [1] [4] [5] [11] [12]

  4. ENIAC - Wikipedia

    en.wikipedia.org/wiki/ENIAC

    Engineers reduced ENIAC's tube failures to the more acceptable rate of one tube every two days. According to an interview in 1989 with Eckert, "We had a tube fail about every two days and we could locate the problem within 15 minutes." [36] In 1954, the longest continuous period of operation without a failure was 116 hours—close to five days.

  5. .22 long - Wikipedia

    en.wikipedia.org/wiki/.22_Long

    The .22 long is a variety of .22 caliber (5.6 mm) rimfire ammunition.The .22 long is the second-oldest of the surviving rimfire cartridges, dating back to 1871, when it was loaded with a 29 gr (1.9 g) bullet and 5 gr (0.32 g) of black powder, 25% more than the .22 short on which it was based.

  6. Compact fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Compact_fluorescent_lamp

    This was the first successful screw-in replacement for an incandescent lamp, using new rare earth aluminum lattice phosphors to solve the problem of lumen depreciation that would normally occur quickly in such a thin tube; however, it was not widely adopted, because of its large size, weight (over half a kilogram), pronounced 50 Hz flicker and ...

  7. SR Merchant Navy class - Wikipedia

    en.wikipedia.org/wiki/SR_Merchant_Navy_class

    1 rebuilt under conversion to unrebuilt specifications The SR Merchant Navy class (originally known as the 21C1 class , and later informally known as Bulleid Pacifics , Spam Cans – which name was also applied to the Light Pacifics – or Packets ) is a class of air-smoothed 4-6-2 (Pacific) steam locomotives designed for the Southern Railway ...

  8. Niobium - Wikipedia

    en.wikipedia.org/wiki/Niobium

    The arc-tube seals of high pressure sodium vapor lamps are made from niobium, sometimes alloyed with 1% of zirconium; niobium has a very similar coefficient of thermal expansion, matching the sintered alumina arc tube ceramic, a translucent material which resists chemical attack or reduction by the hot liquid sodium and sodium vapour contained ...

  9. Dodge M37 - Wikipedia

    en.wikipedia.org/wiki/Dodge_M37

    Toggle Specifications subsection. 3.1 Engine. 3.2 Driveline. ... Download as PDF; Printable version; ... Tire Size. 9.00 × 16 - 8 ply non-directional military ...

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