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In domestic applications, traps are typically U, S, Q, or J-shaped pipe located below or within a plumbing fixture.An S-shaped trap is also known as an S-bend.It was invented by Alexander Cumming in 1775 but became known as the U-bend following the introduction of the U-shaped trap by Thomas Crapper in 1880.
Bollards are used to protect buildings and people in public spaces from car ramming attacks [21] and accidental collisions. Related protections against deliberate attacks are wedge barriers and archer barriers. [22] The bollards are effective protection against deliberate attacks if properly deployed and maintained.
In many countries such as Australia and in some American states such as California, traffic barrels are rarely seen; pillar-shaped moveable bollards are instead used where larger and sturdier warning or delineation devices are needed. Typically, bollards are 1,150 mm (45 in) high fluorescent orange posts with reflective sleeve and heavyweight ...
Traffic barrier with a pedestrian guardrail behind it. Traffic barriers (known in North America as guardrails or guard rails, [1] in Britain as crash barriers, [2] and in auto racing as Armco barriers [3]) keep vehicles within their roadway and prevent them from colliding with dangerous obstacles such as boulders, sign supports, trees, bridge abutments, buildings, walls, and large storm drains ...
Aiviq is an American icebreaking anchor handling tug supply vessel (AHTS) built in 2012 to support oil exploration and drilling in the Chukchi Sea off Alaska.The vessel's primary task was towing and laying anchors for drilling rigs, and oil spill response.
Bollard pull can increase up to 30% with ducts. With decelerating ducts, the circulation opposite of the Kort nozzle, resulting in a negative thrust of the duct. This type is used for high speed vessels with increased exposure to cavitation and vessels that want to reduce noise levels, such as warships.
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