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  2. Concentric reducer - Wikipedia

    en.wikipedia.org/wiki/Concentric_reducer

    A copper concentric reducer. A concentric reducer is used to join pipe sections or tube sections on the same axis. [1] The concentric reducer is cone-shaped, and is used when there is a shift in diameter between pipes. [1] For example, when a 1" pipe transitions into a 3/4" pipe and the top or bottom of the pipe doesn't need to remain level. [2]

  3. Eccentric reducer - Wikipedia

    en.wikipedia.org/wiki/Eccentric_reducer

    They are used where the diameter of the pipe on the upstream side of the fitting (i.e. where flow is coming from) is larger than the downstream side, and where there is a danger that vapour may accumulate. [1] Unlike a concentric reducer, which resembles a cone, eccentric reducers have an edge that is parallel to the connecting pipe, referred ...

  4. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  5. Honeywell ARGUS - Wikipedia

    en.wikipedia.org/wiki/Honeywell_ARGUS

    ARGUS, an acronym for Automatic Routine Generating and Updating System, [1] was an Assembly Language devised in the late 1950s [2] by Honeywell for their Honeywell 800 and 1800 computers. As with other Assembly Languages, each line of ARGUS was copied on to one card and related to one word in memory, except that one ARGUS command, RESERVE ...

  6. Reduction drive - Wikipedia

    en.wikipedia.org/wiki/Reduction_drive

    The Midwest twin-rotor wankel engine has an eccentric shaft that spins up to 7,800 rpm, so a 2.96:1 reduction gear is used. Aero-engine reduction gears are typically of the gear type, but smaller two-stroke engines such as the Rotax 582 use belt drive with toothed belts, which is a cheap and lightweight option with built-in damping of power surges.

  7. 1,2-rearrangement - Wikipedia

    en.wikipedia.org/wiki/1,2-rearrangement

    A 1,2-rearrangement or 1,2-migration or 1,2-shift or Whitmore 1,2-shift [1] is an organic reaction where a substituent moves from one atom to another atom in a chemical compound. In a 1,2 shift the movement involves two adjacent atoms but moves over larger distances are possible. In the example below the substituent R moves from carbon atom C 2 ...

  8. Wildenstein & Company - Wikipedia

    en.wikipedia.org/wiki/Wildenstein_&_Company

    Wildenstein & Company, a private art dealership, was founded in Paris by Nathan Wildenstein in the mid-19th century and run by his family ever since. [1] The Wildenstein Institute , established by Nathan's son Georges , maintains one of the largest art history reference libraries in the world.

  9. Spin-1/2 - Wikipedia

    en.wikipedia.org/wiki/Spin-1/2

    Particles having net spin ⁠ 1 / 2 ⁠ include the proton, neutron, electron, neutrino, and quarks. The dynamics of spin-⁠ 1 / 2 ⁠ objects cannot be accurately described using classical physics; they are among the simplest systems which require quantum mechanics to describe them. As such, the study of the behavior of spin-⁠ 1 / 2 ...

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