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  2. Surface-supplied diving - Wikipedia

    en.wikipedia.org/wiki/Surface-supplied_diving

    Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California US Navy Diver using Kirby Morgan Superlight 37 diving helmet [1]. Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. [2]

  3. Pin tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Pin_tumbler_lock

    The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.

  4. R-clip - Wikipedia

    en.wikipedia.org/wiki/R-clip

    An R-clip, also known as an R-pin, R-key, hairpin cotter pin, [1] hairpin cotter, [2] bridge pin, [2] hitch pin clip [3] [4] or spring cotter pin, [5] is a fastener made of a durable but flexible material, commonly hardened metal wire, resembling the shape of the letter "R".

  5. Tubular pin tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Tubular_pin_tumbler_lock

    A tubular lock and key. A tubular pin tumbler lock, also known as a circle pin tumbler lock, radial lock, or the trademark Ace lock popularized by manufacturer Chicago Lock Company since 1933, is a variety of pin tumbler lock in which a number of pins are arranged in a circular pattern, and the corresponding key is tubular or cylindrical in shape.

  6. Ancient Roman military clothing - Wikipedia

    en.wikipedia.org/wiki/Ancient_Roman_military...

    Galea or soldier's helmet. Variant forms included the Coolus helmet, Montefortino helmet, and Imperial helmet. Greaves, to protect the legs. Lorica , including: Lorica hamata (mail armour) Lorica manica (arm guards) Lorica plumata (a form of scale armour resembling feathers) Lorica segmentata (segmented armour) Lorica squamata (scale armour)

  7. Visor (armor) - Wikipedia

    en.wikipedia.org/wiki/Visor_(armor)

    A visor was an armored covering for the face often used in conjunction with Late Medieval war helmets such as the bascinet or sallet. [1] The visor usually consisted of a hinged piece of steel that contained openings for breathing and vision. Appropriately, breaths refers to the holes in the metal of the visor. [2]

  8. Personal protective equipment - Wikipedia

    en.wikipedia.org/wiki/Personal_protective_equipment

    Personal protective equipment (PPE) is protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injury or infection. The hazards addressed by protective equipment include physical, electrical, heat, chemical, biohazards, and airborne particulate matter.

  9. Disc tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Disc_tumbler_lock

    The underside of a disc tumbler lock A key for a disc tumbler lock. A disc tumbler or disc detainer lock is a lock composed of slotted rotating detainer discs. The lock was invented by Finnish founder of Abloy, Emil Henriksson (1886–1959) in 1907 and first manufactured under the Abloy brand in 1918.

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