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  2. Littlejohn adaptor - Wikipedia

    en.wikipedia.org/wiki/Littlejohn_adaptor

    The Littlejohn adaptor/APCNR combination gave the 2 pounder a similar effect as the armour-piercing discarding sabot round used with the much larger and heavier QF 6 pounder gun. The muzzle velocity of the APSV Mark II shell was 1,143 m/s compared with the 792 m/s of the normal 1.2 kg APCBC shell.

  3. Caliber conversion device - Wikipedia

    en.wikipedia.org/wiki/Caliber_conversion_device

    Cartridge adapters have also been made to use .38 caliber handgun cartridges with bullet diameters of approximately .357-inch (9.1 mm) in .35 caliber rifles designed for bullets of .358-inch (9.1 mm) diameter. [3] Supplemental chambers in .22 caliber, and potentially .17 caliber as well, pose a special problem not shared by larger calibers.

  4. Four square - Wikipedia

    en.wikipedia.org/wiki/Four_square

    Four square [1] (also called handball, champ, four squares or box ball) is a global sport played on a square court divided by two perpendicular lines into four identical boxes creating four squares labelled 14 or A–D. [2] Four square is a popular game at elementary schools with little required equipment, almost no setup, and short rounds ...

  5. NES Four Score and Satellite - Wikipedia

    en.wikipedia.org/wiki/NES_Four_Score_and_Satellite

    [2] [3] The Satellite consists of two units: a small infrared receiver that plugs into the console's controller ports, and a main unit that is powered by six C batteries and must have a line of sight to the receiver. [4] Both devices have four controller ports and two "Turbo" switches to simulate rapid pressing of the A and B buttons.

  6. List of level editors - Wikipedia

    en.wikipedia.org/wiki/List_of_level_editors

    New Super Mario Bros. 2 [1] Construction mode: Mega Man Powered Up: Commando Level Editor: Command & Conquer: Renegade: Creation Kit: The Elder Scrolls V: Skyrim: Based on the previous The Elder Scrolls Construction Set: D3Radiant: Doom 3: Not compatible with Doom 3: BFG Edition: Deus Ex SDK: Deus Ex: UnrealEd: Dezaemon: Dezaemon (NES, 1991) [2 ...

  7. Robertson screw - Wikipedia

    en.wikipedia.org/wiki/Robertson_screw

    [3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily removed if painted over, or old and rusty. [3]: 85–86 In industry, they speed up production and reduce product damage.

  8. Lens adapter - Wikipedia

    en.wikipedia.org/wiki/Lens_Adapter

    [4] The depth-of-field adapter (also called a DOF adapter or 35 mm adapter) is a largely obsolete device that uses a ground glass focusing screen to enable the use of interchangeable lenses on a fixed lens camcorder. [5] There are also lens adapters made for other optical systems, including microscopes and telescopes.

  9. Napier's bones - Wikipedia

    en.wikipedia.org/wiki/Napier's_bones

    Napier's bones for 4, 2, and 5 are placed into the board, in sequence. These bones show the larger figure which will be multiplied. These bones show the larger figure which will be multiplied. The numbers lower in each column, or bone, are the digits found by ordinary multiplication tables for the corresponding integer, positioned above and ...