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  2. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The Charrière is measured by the ''outer'' diameter, and is defined as 1 Fr = 1/3 mm, and thus 1 mm = 3 Fr; therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3. [2] The French units roughly correspond to the outer circumference of the catheter (see table below).

  3. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    1.0 mm – 0.03937 inches or 5/127 (exactly) 1.0 mm – side of a square of area 1 mm²; 1.0 mm – diameter of a pinhead; 1.5 mm – average length of a flea [27] 2.54 mm – distance between pins on old dual in-line package (DIP) electronic components; 5 mm – length of an average red ant; 5 mm – diameter of an average grain of rice

  4. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    Subdivisions of an inch are typically written using dyadic fractions with odd number numerators; for example, two and three-eighths of an inch would be written as ⁠2 + 3 / 8 ⁠ ″ and not as 2.375″ nor as ⁠2 + 6 / 16 ⁠ ″. However, for engineering purposes fractions are commonly given to three or four places of decimals and have been ...

  5. 27.5 mountain bike - Wikipedia

    en.wikipedia.org/wiki/27.5_Mountain_bike

    The wheel size is sometimes erroneously called "650B" [8] [9] as a "marketing term" by some manufacturers for their 27.5", but the 650B size has traditionally been a designation for a 26 inch diameter (ISO ~ 40-584 demi-ballon tire) using the same ISO 584 mm rim [10] used by French tandems, Porteurs and touring bicycles.

  6. Gauge (firearms) - Wikipedia

    en.wikipedia.org/wiki/Gauge_(firearms)

    A 12-gauge shotgun, nominally 18.5 mm (0.73 in), can range from a tight 18 mm (0.71 in) to an extreme overbore of 20 mm (0.79 in). Some also claim an increased velocity with the overbored barrels, up to 15 m/s (49 ft/s), which is due to the larger swept volume of the overbored barrel.

  7. Ancient Roman units of measurement - Wikipedia

    en.wikipedia.org/wiki/Ancient_Roman_units_of...

    inch thumb 1 ⁄ 12 pes 24.6 mm 0.971 in 0.0809 ft palmus (minor) palm 1 ⁄ 4 pes 74 mm 0.243 ft palmus maior: palm length (lit."greater palm") 3 ⁄ 4 pes 222 mm 0.728 ft in late times pes (plural: pedes) foot: 1 pes 296 mm 0.971 ft sometimes distinguished as the pes monetalis [a] palmipes foot and a palm 1 + 1 ⁄ 4 pedes 370 mm

  8. Coober Pedy - Wikipedia

    en.wikipedia.org/wiki/Coober_Pedy

    The Olympic Australis measures 11 inches in length, 4 + 3 ⁄ 4 inches height, 4 + 1 ⁄ 2 inches in width, and weighs 17,000 carats (3,450 g, 121.7 oz, or 7.6 lb). It was valued at AU$2,500,000 (roughly US$1,708,000) in both 1997 and 2005, and is currently held in the offices of Altmann & Cherny Ltd , one of Australia's most prominent vendors ...

  9. Glossary of British ordnance terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_British...

    In the case of the 15-inch (381 mm) guns fitted to the World War I Marshal Ney-class monitors a gun was generally condemned when wear reached about 0.74 in (19 mm) at 1 in (25 mm) from the start of the rifling. However it was the usual practice to replace guns when their projected remaining life fell below the ship's normal full outfit of ...