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  2. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    The microwave is between 1 meter to 1 millimeter. The millimetre ( international spelling; SI unit symbol mm) or millimeter ( American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length. Therefore, there are one thousand millimetres in a metre.

  3. 30 mm caliber - Wikipedia

    en.wikipedia.org/wiki/30_mm_caliber

    The 30 mm caliber is a range of autocannon ammunition. It includes the NATO standardized Swiss 30×173mm (STANAG 4624), the Soviet 30×155mmB, 30×165mm and 30×210mmB, the Czechoslovak 30×210mm, the Yugoslav 30×192mm, the British 30×113mmB, and the French 30×150mmB and 30×170mm cartridges.

  4. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    Works with 15 mm miniatures where a 6 foot man would equal 15.24 mm 1:110: 2.771 mm Used for some model ships, aircraft and diecast cars. 1:108: 2.822 mm An historic size for ships, also used for rockets and spacecraft. 15 mm figure scale for wargaming is considered interchangeable with this scale. 1:100: 3.048 mm

  5. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    12 ft. Metric ( SI) units. 25.4 mm. A fire hydrant marked as 3-inch. The inch (symbol: in or ″) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to 1 36 yard or 1 12 of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate similar ...

  6. Letter (paper size) - Wikipedia

    en.wikipedia.org/wiki/Letter_(paper_size)

    The letter size falls within the range of the historical quarto size, which since pre-modern times refers to page sizes of 8 to 9 inches (200 to 230 mm) wide and 10 to 11 inches (250 to 280 mm) high, and it is indeed almost exactly one quarter of the old Imperial (British) paper size known as demy quarto – 17 + 1 ⁄ 2 by 22 + 1 ⁄ 2 inches ...

  7. MG 151 cannon - Wikipedia

    en.wikipedia.org/wiki/MG_151_cannon

    MG 151 cannon. The Maschinengewehr (MG) 151 is a low caliber, belt fed autocannon for aircraft use, developed in Nazi Germany from 1934 to 1940 and produced by Waffenfabrik Mauser during World War II. It was originally produced in 15.1 mm caliber from 1940, with a 15×96mm cartridge, but due to demand for higher effect against aircraft ...

  8. Photo print sizes - Wikipedia

    en.wikipedia.org/wiki/Photo_print_sizes

    In the normal series, the long edge is the length of the short edge plus 2 inches (10 in or less) or 3 inches (11 in and above). The alternative Super series, denoted SnR, nR Plus or nR+, has an aspect ratio of 3∶2 (or as close as possible) and thus provides a better fit for standard 135 film (35 mm) at sizes of 8 inches or above. 5R is twice ...

  9. 7.62 mm caliber - Wikipedia

    en.wikipedia.org/wiki/7.62_mm_caliber

    The 7.62 mm designation refers to the internal diameter of the barrel at the lands (the raised helical ridges in rifled gun barrels). The actual bullet caliber is often 7.82 mm (0.308 in), although Soviet weapons commonly use a 7.91 mm (0.311 in) bullet, as do older British ( .303 British) and Japanese ( 7.7×58mm Arisaka) cartridges.