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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. Line (unit) - Wikipedia

    en.wikipedia.org/wiki/Line_(unit)

    The Russian liniya (ли́ния), 1 ⁄ 10 of the diuym which had been set precisely equal to an English inch by Peter the Great [13] The French ligne or "Paris line", 1 ⁄ 12 of the French inch (French: pouce), 2.256 mm and about 1.06 L. The Portuguese linha, 1 ⁄ 12 of the Portuguese inch or 12 "points" (pontos) or 2.29 mm

  4. Point (typography) - Wikipedia

    en.wikipedia.org/wiki/Point_(typography)

    [10] [11] [12]: 60–66 The system of Fournier was based on a different French foot of c. 298 mm. With the usual convention that 1 foot equals 12 inches, 1 inch (pouce) was divided into 12 lines (lignes) and 1 line was further divided into 6 typographic points (points typographiques). One Fournier point is about 0.0135 English inches.

  5. Traditional point-size names - Wikipedia

    en.wikipedia.org/wiki/Traditional_point-size_names

    12.7 mm: Double Great Primer Trismégiste: Kanon Canon [8] ... Inch: Double-trismégiste: Sabon Sechscicero [8] Kleine Sabon [22] 6 cicero 84 ≈ 29.633 mm: Seven ...

  6. List of rail transport modelling scale standards - Wikipedia

    en.wikipedia.org/wiki/List_of_rail_transport...

    12 mm (0.472 in) Track was introduced by Peco in 2022, closely followed by a range of locomotives, rolling stock and track from Hornby. This has the accurate scale and gauge combination of 2.54 mm : 1 ft on 12 mm track, as has been used by European and American hobbyists, who refer to this as TT. TT3 or 3 mm: 1:102: 12 mm (0.472 in)

  7. 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 ...

  8. 12 mm caliber - Wikipedia

    en.wikipedia.org/wiki/12_mm_caliber

    This is a list of firearm cartridges which have bullets in the 12 millimetres (0.47 in) to 12.99 millimetres (0.511 in) caliber range.. Length refers to the cartridge case length.

  9. Gauge (firearms) - Wikipedia

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

    However, the 3 + 1 ⁄ 2-inch (89 mm) 12-gauge shell, with its higher SAAMI pressure rating of 14,000 psi (97 MPa) compared to standard 2 + 3 ⁄ 4-inch (70 mm) and 3-inch (76 mm) 12-gauge shells with their lower pressure rating of 11,500 psi (79 MPa), began to approach the performance of the 3 + 1 ⁄ 2-inch (89 mm) 10-gauge shells with a ...