quadruple$65980$ - traduzione in olandese
![class]] of engine was built in 1942–1950 and operated until 1988.](https://commons.wikimedia.org/wiki/Special:FilePath/52 8134 Hoentrop 2012-09-16.jpg?width=200 "class]] of engine was built in 1942–1950 and operated until 1988.")
![An [[injector]] uses a jet of steam to force water into the boiler. Injectors are inefficient but simple enough to be suitable for use on locomotives.](https://commons.wikimedia.org/wiki/Special:FilePath/Boiler Feed Injector Diagram.svg?width=200 "An [[injector]] uses a jet of steam to force water into the boiler. Injectors are inefficient but simple enough to be suitable for use on locomotives.")
![[[Centrifugal governor]] in the [[Boulton & Watt engine]] 1788 [[Lap Engine]].](https://commons.wikimedia.org/wiki/Special:FilePath/Boulton and Watt centrifugal governor-MJ.jpg?width=200 "[[Centrifugal governor]] in the [[Boulton & Watt engine]] 1788 [[Lap Engine]].")
![An industrial boiler used for a [[stationary steam engine]]](https://commons.wikimedia.org/wiki/Special:FilePath/Dampfkessel für eine Stationärdampfmaschine im Textilmuseum Bocholt.jpg?width=200 "An industrial boiler used for a [[stationary steam engine]]")
![A rotor of a modern [[steam turbine]], used in a [[power plant]]](https://commons.wikimedia.org/wiki/Special:FilePath/Dampfturbine Laeufer01.jpg?width=200 "A rotor of a modern [[steam turbine]], used in a [[power plant]]")
![Schematic [[Indicator diagram]] showing the four events in a double piston stroke. See: Monitoring and control (above)](https://commons.wikimedia.org/wiki/Special:FilePath/Indicator diagram steam admission.svg?width=200 "Schematic [[Indicator diagram]] showing the four events in a double piston stroke. See: Monitoring and control (above)")
![[[Jacob Leupold]]'s steam engine, 1720](https://commons.wikimedia.org/wiki/Special:FilePath/Jacob Leupold Steam engine 1720.jpg?width=200 "[[Jacob Leupold]]'s steam engine, 1720")
![Operation of a simple [[oscillating cylinder steam engine]]](https://commons.wikimedia.org/wiki/Special:FilePath/Oscillating cylinder.svg?width=200 "Operation of a simple [[oscillating cylinder steam engine]]")
![Flow diagram of the four main devices used in the [[Rankine cycle]]. 1) Feedwater pump 2) Boiler or steam generator 3) Turbine or engine 4) Condenser; where ''Q''=heat and ''W''=work. Most of the heat is rejected as waste.](https://commons.wikimedia.org/wiki/Special:FilePath/Rankine cycle layout.png?width=200 "Flow diagram of the four main devices used in the [[Rankine cycle]]. 1) Feedwater pump 2) Boiler or steam generator 3) Turbine or engine 4) Condenser; where ''Q''=heat and ''W''=work. Most of the heat is rejected as waste.")
![Double acting]] stationary engine. This was the common mill engine of the mid 19th century. Note the [[slide valve]] with concave, almost "D" shaped, underside.](https://commons.wikimedia.org/wiki/Special:FilePath/Steam engine in action.gif?width=200 "Double acting]] stationary engine. This was the common mill engine of the mid 19th century. Note the [[slide valve]] with concave, almost \"D\" shaped, underside.")
.jpg?width=200 "Richard's indicator instrument of 1875. See: Indicator diagram (below)")
![mill engine]] from [[Stott Park Bobbin Mill]], Cumbria, England](https://commons.wikimedia.org/wiki/Special:FilePath/Stott Park Bobbin Mill Steam Engine.jpg?width=200 "mill engine]] from [[Stott Park Bobbin Mill]], Cumbria, England")
![''Hercules'']]](https://commons.wikimedia.org/wiki/Special:FilePath/Triple expansion marine steam engine.jpg?width=200 "''Hercules'']]")
![''[[Turbinia]]'' – the first [[steam turbine]]-powered ship](https://commons.wikimedia.org/wiki/Special:FilePath/Turbinia At Speed.jpg?width=200 "''[[Turbinia]]'' – the first [[steam turbine]]-powered ship")
![Animation of a [[uniflow steam engine]].<br />The [[poppet valves]] are controlled by the rotating [[camshaft]] at the top. High-pressure steam enters, red, and exhausts, yellow.](https://commons.wikimedia.org/wiki/Special:FilePath/Uniflow steam engine.gif?width=200 "Animation of a [[uniflow steam engine]].<br />The [[poppet valves]] are controlled by the rotating [[camshaft]] at the top. High-pressure steam enters, red, and exhausts, yellow.")
![[[Union Pacific 844]] a "FEF-3" 4-8-4 "Northern" type steam locomotive](https://commons.wikimedia.org/wiki/Special:FilePath/Union Pacific 844, Painted Rocks, NV, 2009 (crop).jpg?width=200 "[[Union Pacific 844]] a \"FEF-3\" 4-8-4 \"Northern\" type steam locomotive")
![Watt]] pumping engine](https://commons.wikimedia.org/wiki/Special:FilePath/Watt steam pumping engine.JPG?width=200 "Watt]] pumping engine")
![GNR N2 Class]] No.1744 at Weybourne nr. [[Sheringham]], [[Norfolk]]](https://commons.wikimedia.org/wiki/Special:FilePath/GNR N2 1744 at Weybourne - geograph.org.uk - 1479849.jpg?width=200 "GNR N2 Class]] No.1744 at Weybourne nr. [[Sheringham]], [[Norfolk]]")
![steam-powered]] bicycle by John van de Riet, in [[Dortmund]]](https://commons.wikimedia.org/wiki/Special:FilePath/Dampf-Fahrrad 2.jpg?width=200 "steam-powered]] bicycle by John van de Riet, in [[Dortmund]]")
![British horse-drawn [[fire engine]] with steam-powered water pump](https://commons.wikimedia.org/wiki/Special:FilePath/Steam-powered fire engine.jpg?width=200 "British horse-drawn [[fire engine]] with steam-powered water pump")
![5¼-inch DD-Disk](https://commons.wikimedia.org/wiki/Special:FilePath/5.25"-Diskette.jpg?width=200 "5¼-inch DD-Disk")
Definizione
Wikipedia
In telecommunications, quadruple play or quad play is a marketing term combining the triple play service of broadband Internet access, television and telephone with wireless service provisions. This service set is also sometimes referred to as "The Fantastic Four".
In addition to being a testament to technological convergence, quadruple play also involves a diverse group of stakeholders, from large Internet backbone providers to smaller startups.
Advances in LTE and other technologies are rapidly improving the ability to transfer information over a wireless link at various combinations of speeds, distances, and non-line-of-sight conditions.
"Mobile service provisions" refers in part to the ability of subscribers to purchase mobile phone like services, as is often seen in co-marketing efforts between providers of landline services. It also reflects the ambition to gain wireless access on the go to voice, internet, and content/video without tethering to a network via cables.
