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  2. Barbed wire - Wikipedia

    en.wikipedia.org/wiki/Barbed_wire

    Gates vary in width from 3.5 metres (12 ft) to allow the passage of vehicles and tractors, to 12 metres (40 ft) on farm land to pass combines and swathers. One style of gate is called the Hampshire gate in the UK, a New Zealand gate in some areas, and often simply a "gate" elsewhere. Made of wire with posts attached at both ends and in the ...

  3. Guard rail - Wikipedia

    en.wikipedia.org/wiki/Guard_rail

    Staircase railings in the Degré du roi, part of the Petit appartement du roi, in the Palace of Versailles, Versailles, France. Guard rails, guardrails, railings or protective guarding, [1] in general, are a boundary feature and may be a means to prevent or deter access to dangerous or off-limits areas while allowing light and visibility in a greater way than a fence.

  4. Door - Wikipedia

    en.wikipedia.org/wiki/Door

    The hinge of the operating door is next to the adjacent fixed door and the latch is located at the wall opening jamb rather than between the two doors or with the use of an espagnolette bolt. A Lev door or convection door is an internal floor-to-ceiling (full height) door, consisting of a standard door leaf and an upper leaf in place of the ...

  5. Lock (water navigation) - Wikipedia

    en.wikipedia.org/wiki/Lock_(water_navigation)

    A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.

  6. Brooklyn Navy Yard - Wikipedia

    en.wikipedia.org/wiki/Brooklyn_Navy_Yard

    The building also hosts displays and videos about the new businesses in the facility. [306] [307] Plans for a museum dedicated to the Brooklyn Navy Yard date to 1975, though the museum was originally proposed to be located in a different building. [309] The center contains a 24,500-square-foot (2,280 m 2) annex with a laser-cut metal facade. [303]

  7. Glossary of nautical terms (M–Z) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms...

    1. Living in the open ocean rather than coastal or inland waters (e.g. a pelagic shark). 2. Taking place in the open ocean (e.g. pelagic fishing, pelagic sealing). pelican hook. Also called a slip-hook or Davey hook. A hook with a hinge in the curve of the hook, normally held closed by a metal ring that keeps the two hinged parts together.