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Rosseti
Rosseti (ПАО «Россети») is a Russian state-controlled electric grid holding, created in 2002, that manages 2.5 million kilometers of lines and transmits about 80% of Russia's electricity.
Rossi X-ray Timing Explorer
The Rossi X-ray Timing Explorer (RXTE) was a NASA satellite launched in 1995 to study rapid time variability in cosmic X-ray sources; it operated for over 16 years until 2012.
Rossiya Airlines
Rossiya Airlines (Авиакомпания «Россия») is a Russian full-service airline based in Saint Petersburg and owned by the Aeroflot Group, carrying 12 million passengers in 2025.
Rossiya Hotel
The Rossiya Hotel, also known as Hotel Russia, was a Soviet-era hotel in central Moscow, built in 1964–1967 and once the largest hotel in the world.
Rosslyn Chapel
Rosslyn Chapel, formally the Collegiate Church of St Matthew, is a late 15th-century chapel in Roslin, Midlothian, founded in 1446 and famous for its dense stone carvings.
Rostashy-Konnovskoye field
The Rostashy-Konnovskoye field is an operating, medium-sized oil field in Orenburg Oblast, Russia, in the Volga-Ural province, combining two fields discovered in 1982 and developed from 1989.
Rostec (Ростех)
Rostec (Ростех), also known as Rostekhnologii, is a Russian state corporation holding much of the country's defense and high-tech industry, created by law signed by Vladimir Putin in 2007.
Rostechnadzor
Rostechnadzor (Ростехнадзор), formally the Federal Service for Ecological, Technological and Nuclear Supervision, is Russia's federal regulator of industrial, nuclear, and environmental safety, created in 2004.
Rostov nuclear power plant
The Rostov nuclear power plant (Rostov NPP), historically called the Volgodonsk NPP, is a Russian nuclear station near Volgodonsk, Rostov Oblast, with four VVER-1000 reactors totaling 4,071 MW.
Rostselmash
Rostselmash (Ростсельмаш), short for Rostov Agricultural Machinery Plant, is a Russian agricultural machinery manufacturer in Rostov-on-Don, founded in 1929 and Russia's largest producer of combine harvesters.
Rotary (traffic)
A rotary is a circular intersection where traffic travels around a central island, the New England term for what elsewhere is called a traffic circle, typically larger and faster than a roundabout.
Rotary actuator
A rotary actuator is a device that converts hydraulic, pneumatic, or electrical energy into controlled rotary motion, usually limited to one revolution, serving valve automation and robotics.
Rotary cannon
A rotary cannon, or Gatling cannon, is an autocannon whose multiple barrels rotate around a common axis, a principle Richard Gatling patented in 1862 that underlies the M61 Vulcan.
Rotary dial
The rotary dial is a telephone dialing device that sends each digit as electrical pulses; it was the standard way to place calls for most of the 20th century.
Rotary encoder
A rotary encoder, also called a shaft encoder, is a sensor coupled to a rotating shaft that converts its rotation into electrical signals from which angular position, direction of rotation, and speed are derived.
Rotary engine
The rotary engine, most commonly the Wankel engine, is an internal combustion engine that replaces pistons with an eccentric rotating rotor, first built by Felix Wankel in 1957.
Rotary evaporator
The rotary evaporator, known as a rotovap or rotavap, is a laboratory instrument that removes volatile solvents under reduced pressure, invented by Lyman C. Craig in 1950.
Rotary friction welding
Rotary friction welding is a solid-state welding method, invented in 1956, that joins workpieces by rotating one against the other under pressure, producing strong welds without melting the materials.
Rotary position embedding
Rotary position embedding (RoPE) is a method for encoding token positions in transformer models by rotating query and key vectors, introduced in the 2021 RoFormer paper.
Rotary printing press
A rotary printing press prints from a rotating cylinder instead of a flat bed; Richard March Hoe's 1847 press and the 1865 paper web made high-speed newspaper printing possible.
Rotary steerable system
A rotary steerable system is a downhole drilling tool that steers a well directionally while the drill string rotates continuously, first commercialized in the late 1990s.
Rotary switch
A rotary switch is an electromechanical switch whose rotating knob or shaft connects a common terminal to one of several fixed terminals, giving each setting a distinct, visually verifiable position.
Rotary system
The Rotary system was Western Electric's first commercial automatic telephone switching system, using motor-driven rotary selectors under indirect control, with early exchanges in Sweden, France, and England from 1912.
Rotary table
A rotary table is a precision workholding device that rotates a workpiece around a fixed axis, letting a mill or CNC machine cut circular patterns, gears, and multi-face parts in one setup.
Rotary ultrasonic machining
Rotary ultrasonic machining (RUM) is a hybrid process combining diamond grinding with ultrasonic vibration of a rotating tool, used to machine ceramics, glass, and composites.
Rotary vane pump
A rotary vane pump (vane pump) is a positive-displacement pump with a slotted eccentric rotor whose sliding vanes trap fluid and compress it from inlet to outlet.
Rotary variable differential transformer
A rotary variable differential transformer (RVDT) is an electromechanical transducer that measures angular position, producing an AC output voltage proportional to shaft rotation over a linear range of roughly ±40° to ±60°.
Rotary-screw compressor
A rotary-screw compressor, also called a screw compressor, is a positive-displacement compressor that compresses gas between two intermeshing helical rotors in a machined housing, dominating industrial air compression and refrigerant use.
Rotating biological contactor
A rotating biological contactor (RBC) is a wastewater treatment process in which plastic discs on a rotating shaft carry a biofilm through sewage, an alternative to activated sludge.
Rotating detonation engine
A rotating detonation engine (RDE), in rocket form called a rotating detonation rocket engine, burns propellant with a supersonic detonation wave circling an annular chamber, promising higher efficiency.