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2. Chain-link fencing - Wikipedia

   en.wikipedia.org/wiki/Chain-link_fencing

   Chain-link fencing showing the diamond patterning A chain-link fence bordering a residential property. A chain-link fence (also referred to as wire netting, wire-mesh fence, chain-wire fence, cyclone fence, hurricane fence, or diamond-mesh fence) is a type of woven fence usually made from galvanized or linear low-density polyethylene-coated steel wire.

3. Barbed wire - Wikipedia

   en.wikipedia.org/wiki/Barbed_wire

   Chain link fence with barbed wire on top Razor wire is a curved variation of barbed wire. Most barbed wire fences, while sufficient to discourage cattle, are passable by humans who can simply climb over or through the fence by stretching the gaps between the wires using non-barbed sections of the wire as handholds.

4. Frank J. Mafera - Wikipedia

   en.wikipedia.org/wiki/Frank_J._Mafera

   In 1930, Mafera filed an application for a "method of forming wire fence fabric", which was approved in 1931. [1] Mafera's brother already owned a chain-link fence company in Medford, Massachusetts, [2] and Mafera's 1931 patent was one of the several advancements made by the Maferas in the development of chain-link fencing.

5. Hot-dip galvanization - Wikipedia

   en.wikipedia.org/wiki/Hot-dip_galvanization

   Galvanised hand rail Crystalline surface of a hot-dip galvanized handrail, known as "spangle" Protective effect: completely rusted letter box mounted to a hot-dip galvanized wall Steel strip coming out of the zinc pot of a continuous vertical hot-dip galvanizing line. Hot-dip galvanization is a form of galvanization.

6. Perimeter fence - Wikipedia

   en.wikipedia.org/wiki/Perimeter_fence

   An example of detector applied on a perimeter fence is the mems accelerometer. The advantages of having a perimeter intrusion detection system are various, and of great importance, for example we obtain a remarkable capacity to analyse the information produced by each sensor, without the need to increase the resources at the centre.

7. Concertina wire - Wikipedia

   en.wikipedia.org/wiki/Concertina_wire

   Several such coils with a few stakes to secure them in place are just as effective as an ordinary barbed wire fence, which must be built by driving stakes and running multiple wires between them. A platoon of soldiers can deploy a single concertina fence at a rate of about a kilometre (5 ⁄ 8 mile) per hour. Such an obstacle is not very ...