wear-resistant material
61Railgun — A railgun is a purely electrical gun that accelerates a conductive projectile along a pair of metal rails using the same principles as the homopolar motor.Railguns use two sliding or rolling contacts [http://www.youtube.com/watch?v=M0YRslyGiOI… …
62Chromium carbide — Chromium carbide[1] IUPAC name Chro …
63Handgun holster — Holster redirects here. For other uses, see Holster (disambiguation). A handgun holster is a device used to hold or restrict the undesired movement of a handgun, most commonly in a location where it can be easily withdrawn for immediate use.… …
64Classical fencing — is the styles of modern fencing as they existed during the 19th and early 20th century. According to the 19th century fencing master Louis Rondelle, A classical fencer is supposed to be one who observes a fine position, whose attacks are fully… …
65Football helmet — A football helmet A is a protective device used primarily in American football and Canadian football. It consists of a hard plastic top with thick padding on the inside, a facemask made of one or more plastic bars, and a chinstrap. Some players… …
66Bomb disposal — Bomb squad redirects here. For the Suburban Legends EP, see Bomb Squad EP. For the hip hop producers, see The Bomb Squad. The long walk :[1] A British Army ATO approaches a suspect device in Northern Ireland …
67Cupronickel — or copper nickel or cupernickel is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. Cupronickel is highly resistant to corrosion in seawater, because its electrode potential is adjusted to be neutral …
68Holster — A holster is an unspecified, yet specialized article of clothing or a device, worn to hold, or restrict the undesired movement of, an item, such as a handgun or other weapon, cellular telephone, hand tool, or virtually any other small object… …
69Dredging — Dredge redirects here. For other uses, see Dredge (disambiguation). Dredgers redirects here. For the German municipality, see Dreggers. Dredging is an excavation activity or operation usually carried out at least partly underwater, in shallow… …
70Strings (tennis) — In tennis, the strings are the part of a tennis racquet which make contact with the ball. The strings form a woven network inside the head (or hoop ) of the racquet. Composition The material used in tennis string can significantly change the… …
