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  2. Copper tubing - Wikipedia

    en.wikipedia.org/wiki/Copper_tubing

    Common sizes are 15 mm and 22 mm. [7] Other sizes include 18 mm, 28 mm, 35 mm, 42 mm, 54 mm, 66.7 mm, 76.1 mm, and 108 mm outside diameters. Tubing in 8 mm and 10 mm outside diameters is called a "micro bore" and is easier to install, although there is a slightly increased risk of blockage from scale or debris.

  3. Plasma arc welding - Wikipedia

    en.wikipedia.org/wiki/Plasma_arc_welding

    Plasma arc welding is an arc welding process wherein coalescence is produced by the heat obtained from a constricted arc setup between a tungsten/alloy tungsten electrode and the water-cooled (constricting) nozzle (non-transferred arc) or between a tungsten/alloy tungsten electrode and the job (transferred arc). The process employs two inert ...

  4. Rail profile - Wikipedia

    en.wikipedia.org/wiki/Rail_profile

    Welding of rails into longer lengths was first introduced around 1893. Welding can be done in a central depot or in the field. 1895 Hans Goldschmidt, Thermit welding [27] 1935 Charles Cadwell, non-ferrous Thermit welding.

  5. History of the railway track - Wikipedia

    en.wikipedia.org/wiki/History_of_the_railway_track

    The railways moved towards standardisation on a softwood sleeper preserved by pressure injection of creosote, measuring 8 ft 6 in (2.59 m) long by 10 in (250 mm) by 5 in (130 mm). Chairs were secured to the sleepers by trenails (steel spikes driven through a timber sleeve) or three chair-screws on first class routes.

  6. Railroad tie - Wikipedia

    en.wikipedia.org/wiki/Railroad_tie

    The two sleepers adjacent to a joint may be 12 inches (305 mm) wide where the formation is soft or the traffic is heavy and fast. Sleepers are mostly spaced 2 ft 7 in (0.79 m) apart (centre-to-centre) but are closer adjacent to fishplated rail joints where the spacing sequences are as follows with the spacing at the fishplate highlighted .

  7. Murray, Kentucky - Wikipedia

    en.wikipedia.org/wiki/Murray,_Kentucky

    Murray is a home rule-class city [4] in Calloway County, Kentucky, United States. It is the seat of Calloway County [5] and the 19th-largest city in Kentucky. [6] The city's population was 17,307 during the 2020 U.S. census, [7] and its micropolitan area's population is 37,191. Murray is a college town and is the home of Murray State University.

  8. M114 155 mm howitzer - Wikipedia

    en.wikipedia.org/wiki/M114_155_mm_howitzer

    155 mm Howitzer M65 − Yugoslav copy of the M114A1, which was also used by the Yugoslav People's Army. Its virtually identical to the original, with a few minor differences. The M65 fires the standard American M107 HE shell. For training the M65 can be fitted with a 20 mm sub-caliber barrel insert. [10] It was built only in small numbers. [7]

  9. M14 rifle - Wikipedia

    en.wikipedia.org/wiki/M14_rifle

    The M14 rifle, officially the United States Rifle, Caliber 7.62 mm, M14, is an American battle rifle chambered for the 7.62×51mm NATO cartridge.It became the standard-issue rifle for the U.S. military in 1957, replacing the M1 Garand rifle in service with the U.S. Army by 1958 and the U.S. Marine Corps by 1965; deliveries of service rifles to the U.S. Army began in 1959.

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