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  2. Shop-replaceable unit - Wikipedia

    en.wikipedia.org/wiki/Shop-Replaceable_Unit

    A shop-replaceable unit (SRU) or shop-replaceable component (SRC) is a modular component of an airplane, ship or spacecraft that is designed to be replaced by a technician at a backshop.

  3. Spare part - Wikipedia

    en.wikipedia.org/wiki/Spare_part

    A spare part, spare, service part, repair part, or replacement part, is an interchangeable part that is kept in an inventory and used for the repair or refurbishment of defective equipment/units. Spare parts are an important feature of logistics engineering and supply chain management, often comprising dedicated spare parts management systems.

  4. Spare Parts - Wikipedia

    en.wikipedia.org/wiki/Spare_parts

    A spare part is an item of inventory used to replace failed parts. Spare Parts may also refer to: Spare Parts, by Status Quo; Spare Parts, by Servotron; Spare Parts, Slovenian film; Spare Parts, film formerly titled La Vida Robot; Spare Parts (song), by Bruce Springsteen

  5. Interchangeable parts - Wikipedia

    en.wikipedia.org/wiki/Interchangeable_parts

    Eli Terry was using interchangeable parts using a milling machine as early as 1800. Ward Francillon, a horologist, concluded in a study that Terry had already accomplished interchangeable parts as early as 1800. The study examined several of Terry's clocks produced between 1800–1807. The parts were labelled and interchanged as needed.

  6. Supermarine S.5 - Wikipedia

    en.wikipedia.org/wiki/Supermarine_S.5

    The Supermarine S.5 was a 1920s British single-engined single-seat racing seaplane built by Supermarine.Designed specifically for the Schneider Trophy competition, the S.5 was the progenitor of a line of racing aircraft that ultimately led to the iconic Supermarine Spitfire fighter of the Second World War

  7. Lumbar nerves - Wikipedia

    en.wikipedia.org/wiki/Lumbar_nerves

    The lumbar nerves are five spinal nerves which arise from either side of the spinal cord below the thoracic spinal cord and above the sacral spinal cord.They arise from the spinal cord between each pair of lumbar spinal vertebrae and travel through the intervertebral foramina.

  8. Kruskal–Szekeres coordinates - Wikipedia

    en.wikipedia.org/wiki/Kruskal–Szekeres_coordinates

    Kruskal–Szekeres diagram, illustrated for 2GM=1. The quadrants are the black hole interior (II), the white hole interior (IV) and the two exterior regions (I and III). The dotted 45° lines, which separate these four regions, are the event horizons. The darker hyperbolas which bound the top and bottom of the diagram are the physical ...

  9. Sacral spinal nerve 5 - Wikipedia

    en.wikipedia.org/wiki/Sacral_spinal_nerve_5

    The sacral spinal nerve 5 (S5) is a spinal nerve of the sacral segment. [1] It originates from the spinal column from below the 5th body of the sacrum. Sacrum, showing bodies in center. S5 supplies the coccygeus muscle.