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A doorstop (also door stopper, door stop or door wedge) is an object or device used to hold a door open or closed, or to prevent a door from opening too widely. The same word is used to refer to a thin slat built inside a door frame to prevent a door from swinging through when closed.
A truck-mounted attenuator (TMA) in New Zealand. Truck mounted attenuators (TMA), similar in some ways to railcar buffers, can be deployed on vehicles that are prone to being struck from behind, such as snow plows and road construction or maintenance vehicles. Work zone regulations often specify a minimum buffer distance between the attenuator ...
For example, a key may open the first door, but a personal identification number entered on a number pad opens the second. [5] Other methods of opening doors include proximity cards or biometric devices such as fingerprint readers or iris recognition scans. Time of Flight sensors are used in high security environments.
A buffer stop, bumper, bumping post, bumper block or stopblock (US), is a device to prevent railway vehicles from going past the end of a physical section of track. The design of the buffer stop is dependent, in part, on the kind of couplings that the railway uses, since the coupling gear is
A pneumatic buffer with sections cut away. A buffer is a part of the buffers and chain coupler system used on the railway systems of many countries, among them most of those in Europe, for attaching railway vehicles together (in North America, rolling stock instead has draft gear built into the couplers).
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A buffer strip is an area of land maintained in permanent vegetation that helps to control air quality, soil quality, and water quality, along with other environmental problems, dealing primarily on land that is used in agriculture.
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