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23 mm caliber is a specific size of popular autocannon ammunition.. This ammunition size has been widely used in many conflicts worldwide. Examples of armaments using it are:
The BTR-94's turret BAU-23x2 [1] is larger than the BTR-80's BPU-1. It is fitted with a twin 23x152mm gun 2A7M with 200 rounds, a coaxial KT-7.62 machine gun with 2,000 rounds, six 81 mm smoke grenade launchers and a combined 1PZ-7-23 optical sight.
Ehrenfried Walther von Tschirnhaus. In mathematics, a Tschirnhaus transformation, also known as Tschirnhausen transformation, is a type of mapping on polynomials developed by Ehrenfried Walther von Tschirnhaus in 1683.
The ZU-23-2 was developed in the late 1950s. It was designed to engage low-flying targets at a range of 2.5 km as well as armoured vehicles at a range of two kilometres and for direct defence of troops and strategic locations against air assault usually conducted by helicopters and low-flying airplanes. [7]
Twenty-three is the ninth prime number, the smallest odd prime that is not a twin prime. [1] It is, however, a cousin prime with 19, and a sexy prime with 17 and 29; while also being the largest member of the first prime sextuplet (7, 11, 13, 17, 19, 23). [2]