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  2. List of heavy mortars - Wikipedia

    en.wikipedia.org/wiki/List_of_heavy_mortars

    Ordnance ML 4.2 inch Mortar United Kingdom: World War II, Korea 107: 4.2-inch mortars M2 and M30 United States: World War II, Korea, Vietnam 140: 14 cm Minenwerfer M 15 Austria-Hungary: World War I 148: Coehorn mortar M. 1841 United States: 1841 150: Mortier de 150 mm T Mle 1916 Batignolles France: World War I 150: Mortier de 150 mm T Mle 1917 ...

  3. 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 ...

  4. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    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.

  5. List of howitzers - Wikipedia

    en.wikipedia.org/wiki/List_of_howitzers

    Obice da 105/14 Kingdom of Italy ... M115 howitzer, 8 inch M1 ... Caliber (mm) Weapon name Country of origin Usage 53 5,3 cm L24 Kanone 1887

  6. Pipe (fluid conveyance) - Wikipedia

    en.wikipedia.org/wiki/Pipe_(fluid_conveyance)

    In the 1930s, the pipe was designated by its internal diameter and a 1 ⁄ 16-inch (1.6 mm) wall thickness. Consequently, a 1-inch (25 mm) copper pipe had a 1 + 1 ⁄ 8-inch (28.58 mm) outside diameter. The outside diameter was the important dimension for mating with fittings. The wall thickness on modern copper is usually thinner than 1 ⁄ 16 ...

  7. D-subminiature - Wikipedia

    en.wikipedia.org/wiki/D-subminiature

    The contacts in each row of these connectors are spaced 326/3000 of an inch apart, or approximately 0.1087 inches (2.76 mm), and the rows are spaced 0.112 inches (2.84 mm) apart; the pins in the two rows are offset by half the distance between adjacent contacts in a row. [7] This spacing is called normal density.

  8. Cannone da 381/50 Ansaldo M1934 - Wikipedia

    en.wikipedia.org/wiki/Cannone_da_381/50_Ansaldo...

    The Cannone da 381/50 Ansaldo M1934 was a 381-millimeter (15 in), 50-caliber naval gun designed and built for the Royal Italian Navy (Regia Marina) by Gio. Ansaldo & C. in the 1930s. The gun served as the main armament of Italy's last battleships , the Littorio class .

  9. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.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.