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  2. 20 mm caliber - Wikipedia

    en.wikipedia.org/wiki/20_mm_caliber

    The usual nomenclature of ammunition indicates the diameter of projectile and the length of the cartridge that holds it; for example, 20×102 mm is a 20 mm projectile in a 102 mm long case. Though this designation is often assumed to be unique, this is not always the case, e.g. there are three different 20×110 mm types which are not compatible.

  3. Samarium–cobalt magnet - Wikipedia

    en.wikipedia.org/wiki/Samarium–cobalt_magnet

    A samarium–cobalt (SmCo) magnet, a type of rare-earth magnet, is a strong permanent magnet made of two basic elements: samarium and cobalt.. They were developed in the early 1960s based on work done by Karl Strnat at Wright-Patterson Air Force Base and Alden Ray at the University of Dayton.

  4. Ferrite (magnet) - Wikipedia

    en.wikipedia.org/wiki/Ferrite_(magnet)

    Ferrite magnets are known for their high magnetic permeability and low electrical conductivity, making them suitable for high-frequency applications. [38] In electric power steering systems, they provide the necessary magnetic field for efficient motor operation, contributing to the system's overall performance and reliability. [ 39 ]

  5. Plastic magnet - Wikipedia

    en.wikipedia.org/wiki/Plastic_magnet

    A plastic magnet is a non-metallic magnet made from an organic polymer. Plastic magnets could be used in computer hardware such as disc drives , as well as in medical devices such as pacemakers and cochlear implants , where the organic material is more likely to be biocompatible than its metallic counterparts.

  6. Magnet - Wikipedia

    en.wikipedia.org/wiki/Magnet

    A magnet's magnetic moment (also called magnetic dipole moment and usually denoted μ) is a vector that characterizes the magnet's overall magnetic properties. For a bar magnet, the direction of the magnetic moment points from the magnet's south pole to its north pole, [ 15 ] and the magnitude relates to how strong and how far apart these poles ...

  7. Plastic bullet - Wikipedia

    en.wikipedia.org/wiki/Plastic_bullet

    The first plastic bullet was made of PVC (some sources say polyurethane), [13] [17] [18] weighed 135 g (4.75 oz), was 38 mm (1.5 in) diameter and 'rather over' 102 mm (4 in) long. The new plastic bullet was a similar size to but lighter than the 149 g (5.25 oz) rubber bullet, but the considerably longer range of the plastic bullet—33–66 m ...

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  9. Magnadur - Wikipedia

    en.wikipedia.org/wiki/Magnadur

    Magnadur is a sintered barium ferrite, specifically BaFe 12 O 19 in an anisotropic form. [1] It is used for making permanent magnets.The material was invented by Mullard and was used initially particularly for focussing rings on cathode-ray tubes.

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