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2. Baby gate - Wikipedia

   en.wikipedia.org/wiki/Baby_gate

   In some situations, pressure gates at the top of stairs have caused serious injury when a child has run against it or when a parent has fallen trying to step over the gate. Hardware mounted gates are the most secure option and should be installed securely into wall studs. [3] Baby gates are typically removed once a child is capable of opening ...

3. Pet door - Wikipedia

   en.wikipedia.org/wiki/Pet_door

   A pet door or pet flap (also referred to in more specific terms, such as cat flap, cat door, kitty door, dog flap, dog door, or doggy/doggie door) is a small opening to allow pets to enter and exit a building on their own without needing a human to open the door. Originally simple holes, the modern form is a hinged and often spring-loaded panel ...

4. Floodgate - Wikipedia

   en.wikipedia.org/wiki/Floodgate

   Jet flow gate, similar to a gate valve but with a conical restriction prior to the gate leaf that focuses the water into a jet. They were developed in the 1940s by the United States Bureau of Reclamation to allow fine control of discharge flow without the cavitation seen in regular gate valves. Jet flow gates are able to handle heads up to 150 m.

5. Engineering Societies' Building - Wikipedia

   en.wikipedia.org/wiki/Engineering_Societies...

   [4] [22] Wrought-iron gates were placed in front of the driveway. [23] The eastern driveway entrance was replaced in 1913 by a six-story building on 23 West 39th Street, while the western entrance still exists and contains a service gate. [4] Under a deed restriction, the adjoining building to the east was restricted to a height of 60 ft (18 m ...

6. Glossary of rail transport terms - Wikipedia

   en.wikipedia.org/wiki/Underbody

   A hydraulic press for forcing locomotive driving wheels on and off their axles. They are fitted with a pressure gage which is usually graduated for total tons pressure and for pounds per square inch on the rams. They are made with capacities up to 400 tons pressure. Wheel–rail interface The on-contact interaction between wheels and rails.

7. M61 Vulcan - Wikipedia

   en.wikipedia.org/wiki/M61_Vulcan

   The M61 Vulcan is a hydraulically, electrically, or pneumatically driven, six-barrel, air-cooled, electrically fired Gatling-style rotary cannon which fires 20 mm × 102 mm (0.787 in × 4.016 in) rounds at an extremely high rate (typically 6,000 rounds per minute).