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  2. Platform screen doors - Wikipedia

    en.wikipedia.org/wiki/Platform_screen_doors

    Platform screen doors on the Elizabeth line at Farringdon, 2019 "Horizontal lift" style doors at Lomonosovskaya station on the Saint Petersburg Metro, the first screen doors in the world. The idea of platform edge doors dates from as early as 1908, when Charles S. Shute of Boston was granted a patent for "Safety fence and gate for railway ...

  3. 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.

  4. Picket fence - Wikipedia

    en.wikipedia.org/wiki/Picket_fence

    The first step in installing a picket fence is to insert the posts into the ground. Traditionally this is done by digging deep holes (usually 36 inches (91 cm) x 12 inches (30 cm)) either manually or with a power auger. The posts are then placed upright into the ground and concrete is poured to cement them into place.

  5. 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.

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