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  2. List of motion picture film formats - Wikipedia

    en.wikipedia.org/wiki/List_of_motion_picture...

    17 mm spherical Giant Expanding Pictures: George Palmer: 1930 35 mm 1.33 0.980" × 0.735" 4 perf, 2 sides spherical 35 mm 1.17 0.826" × 0.708" spherical (with a special projection zoom lens zooming wider and opening masking for key sequences) Kodel Kemco Homovie: Clarence Ogden: 1931 unknown (amateur format) 16 mm 4 sequential images per frame

  3. Barleycorn (unit) - Wikipedia

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

    As modern studies show, the actual length of a kernel of barley varies from as short as 0.16–0.28 in (4–7 mm) to as long as 0.47–0.59 in (12–15 mm) depending on the cultivar. [ 5 ] [ 6 ] Older sources claimed the average length of a grain of barley was 0.345 in (8.8 mm), while that of a grain of " big " was 0.3245 in (8.24 mm).

  4. Dot matrix printing - Wikipedia

    en.wikipedia.org/wiki/Dot_matrix_printing

    This entire image represents an area of printer output approximately 4.5 cm × 1.5 cm (1.77 in × 0.59 in) in size Epson VP-500 Printer with its cover removed Tally Genicom T2240, 24-Pin printer head cross section. This print head has 24 solenoids at the top arranged radially inside a circular casing.

  5. 35 mm movie film - Wikipedia

    en.wikipedia.org/wiki/35_mm_movie_film

    35 mm film is a film gauge used in filmmaking, and the film standard. [1] In motion pictures that record on film, 35 mm is the most commonly used gauge. The name of the gauge is not a direct measurement, and refers to the nominal width of the 35 mm format photographic film, which consists of strips 1.377 ± 0.001 inches (34.976 ± 0.025 mm) wide.

  6. Mk VI light tank - Wikipedia

    en.wikipedia.org/wiki/Mk_VI_light_tank

    The Mk VI possessed a crew of three consisting of a driver, gunner and commander, who also doubled as the radio operator, between 4 mm (0.16 in) and 14 mm (0.55 in) of armour, which could resist rifle and machine gun bullets, and its armament consisted of one water-cooled .303 inch (7.7 mm) Vickers machine gun and one .50 inch (12.7 mm) Vickers ...

  7. Orders of magnitude (length) - Wikipedia

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

    5.56×45mm NATO – standard ammunition size; 6 mm – approximate width of a pencil; 7 mm – length of a Paedophryne amauensis, the smallest-known vertebrate [109] 7.1 mm – length of a sunflower seed; 7.62×51mm NATO – common military ammunition size [110] 8 mm – width of old-format home movie film

  8. British Association screw threads - Wikipedia

    en.wikipedia.org/wiki/British_Association_screw...

    The major diameter is given by 6p 1.2, [4]: 12 rounded to two significant figures in mm and the hex head size (across the flats) is 1.75 times the major diameter. BA sizes are specified by the following British Standards :

  9. Vickers .50 machine gun - Wikipedia

    en.wikipedia.org/wiki/Vickers_.50_machine_gun

    The Vickers .5 inch machine gun (officially "Gun, Machine, Vickers, .5-in") also known as the Vickers .50 was a large-calibre British automatic weapon. The gun was commonly used as a close-in anti-aircraft weapon on Royal Navy and Allied ships, typically in a four-gun mounting (UK) or two-gun mounting (Dutch), as well as tanks and other armoured fighting vehicles.