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The Type 91 10 cm howitzer (九一式十糎榴弾砲, Kyūisshiki Jyūsenchi Ryūdanhō) was a 105 mm (4.13 in) howitzer used by the Imperial Japanese Army during the Second Sino-Japanese War and World War II as the standard Japanese light howitzer.
The United States Mint has minted over 20 different kinds of coins, of many different sizes.Often, it is difficult for people to get a grasp of what much of the historical coinage looked like, at least in relation to modern circulating coins.
The first "true" XK was called "XK Number 1" (distinct from "XK1") and was of 1970 cc nominal capacity with an 83mm/91mm bore/stroke. Thus were developed the two block sizes that formed the basis of all subsequent XK 6-cylinder engines; the shorter block being used for the 2.4 and 2.8-litre engines and the full sized block for both versions of ...
Little David was the nickname of an American 36-inch (910 mm) caliber mortar designed to breach the Siegfried Line and then used for test-firing aerial bombs during World War II.
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Otis Carter Formby King (1876–1944) was an electrical engineer [1] in London who invented and produced a cylindrical slide rule with helical scales, primarily for business uses initially. The product was named Otis King's Patent Calculator , and was manufactured and sold by Carbic Ltd. in London from about 1922 to about 1972.
The balance (also balance scale, beam balance and laboratory balance) was the first mass measuring instrument invented. [1] In its traditional form, it consists of a pivoted horizontal lever with arms of equal length – the beam or tron – and a weighing pan [10] suspended from each arm (hence the plural name "scales " for a
A spring scale, spring balance or newton meter is a type of mechanical force gauge or weighing scale. It consists of a spring fixed at one end with a hook to attach an object at the other. [ 1 ] It works in accordance with Hooke's Law , which states that the force needed to extend or compress a spring by some distance scales linearly with ...