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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 most important and most time-consuming part of a barbed wire fence is constructing the corner post and the bracing assembly. A barbed wire fence is under tremendous tension, often up to half a ton, and so the corner post's sole function is to resist the tension of the fence spans connected to it. The bracing keeps the corner post vertical ...
The barbed wire was arranged in a cat’s cradle formation that for every 12 yards of barbed fence built, 420 yards of barbed wire was strung (or 35 yards of wire per yard of fence). [1] Later versions of this type of barbed wire were manufactured by Germany during the First World War. The reason for this was a wartime shortage of wire to make ...
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.
Pakistan Mercantile Exchange, formerly known as National Commodity Exchange Limited is a futures commodity exchange based in Karachi, Pakistan. It is the only company in Pakistan to provide a centralised and regulated place for commodity futures trading and is regulated by Securities and Exchange Commission of Pakistan (SECP). It began its full ...
The Barbed Wire Patent Case, 143 U.S. 275 was a significant patent dispute in 1892 between plaintiff Joseph Glidden and the USPTO regarding the right of barbed wire. Lucian Smith was the original inventor in 1867 and held patent rights for it, while Glidden made changes to the production of barbed wire, holding the barbs in place, in 1874 that ...
Pakistan Steel today is the country's largest industrial undertaking, having a production capacity of 1.1 million tonnes of steel and not completed to its lay-out design of 2.2 MTPY in a period of 40 years (1973 to 2013). [4]
Completed in 2005, the main buildings in the compound lay on a 3,500-square-metre (38,000 sq ft) plot of land, much larger than those of nearby houses. Around its perimeter ran 3.7-to-5.5-metre-high (12 to 18 ft) concrete walls topped with barbed wire, and there were two security gates. The compound had very few windows.