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Concertina wire. Concertina wire or Dannert wire[1] is a type of barbed wire or razor wire that is formed in large coils which can be expanded like a concertina. In conjunction with plain barbed wire (and/or razor wire/tape) and steel pickets, it is most often used to form military-style wire obstacles. It is also used in non-military settings ...
Like barbed wire, razor wire is available as either straight wire, spiral (helical) coils, concertina (clipped) coils, flat wrapped panels or welded mesh panels. Unlike barbed wire, which usually is available only as plain steel or galvanized, barbed tape razor wire is also manufactured in stainless steel to reduce corrosion from rusting. The ...
The button layouts are generally the same as the original 20-button German concertinas designed by Uhlig in 1834, and in a bisonoric system. Within a few years of its invention, the German concertina was a popular import in England, Ireland, and North America, due to its ease of use and relatively low price. English manufacturers responded to ...
In a March 21 report by the El Paso Times, part of the USA TODAY Network, migrants told reporters that Guard troops were pushing them back behind the concertina wire barriers in U.S. territory ...
Concertina movement. Concertina movement is the method by which a snake or other organism anchors itself with sections of itself and pulls or pushes with other sections to move in the direction it wants to go. To spring forward a snake may require a rough surface to thrust back against. [1][2]
Some of the 400 Texas National Guard members deployed by the state erected concertina wire at the border in El Paso after the city went into emergency mode to deal with the arrivals of hundreds of ...
Beaches were blocked with entanglements of barbed wire, usually in the form of three coils of concertina wire fixed by metal posts, or a simple fence of straight wires supported on waist-high posts. [65] The wire would also demarcate extensive minefields, with both anti-tank and anti-personnel mines on and behind the beaches. On many of the ...
Wire obstacle. In the military science of fortification, wire obstacles are defensive obstacles made from barbed wire, barbed tape or concertina wire. They are designed to disrupt, delay and generally slow down an attacking enemy. During the time that the attackers are slowed by the wire obstacle (or possibly deliberately channelled into ...