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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 .
The effectiveness of any wire obstacle is greatly increased by planting anti-tank and blast antipersonnel mines in and around it. Additionally, connecting bounding anti-personnel mines (e.g. the PROM-1) to the obstacle with tripwires has the effect of booby-trapping the obstacle itself, hindering attempts to clear it.
Barbed wire, also known as barb wire or bob wire, is a type of steel fencing wire constructed with sharp edges or points arranged at intervals along the strands. Its primary use is the construction of inexpensive fences , and it is also used as a security measure atop walls surrounding property.
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 ...
Razor wire—long-barb type on top of a chain link privacy-fence surrounding a utility power sub-station. Barbed tape or razor wire is a mesh of metal strips with sharp edges whose purpose is to prevent trespassing by humans. The term "razor wire", through long usage, has generally been used to describe barbed tape products.
Since the original concertainer, HESCO has developed specialized variants: MIL is the basic earth-colored unit for military use. Example dimensions of typical configurations are 1.4 m × 1.1 m × 9.8 m (4.6 ft × 3.6 ft × 32.2 ft) to 2.1 m × 1.5 m × 30 m (6.9 ft × 4.9 ft × 98.4 ft). [11]
The English concertina and the Duet concertina bear similarities in history and construction. Both systems generally play a chromatic scale and are unisonoric, with each key producing the same note whether the bellows are being pushed or pulled. Both of these English instruments are smaller than German concertinas, and are usually hexagonal in ...
The beginning of Northwestern Steel and Wire Co. (NWSW) can be traced back to Washington M. Dillon's move to Rock Falls, Illinois from Ohio. He founded Northwestern Barbed Wire Co. upon his arrival in 1879. In 1892 Dillon partnered with J.W. Griswold to form Dillon-Griswold Company.