Top 10 tech­ni­cal facts

Zinc and copper. Brass is a metallic alloy that is made of copper and zinc. The proportions of zinc and copper can vary to create different types of brass alloys with varying mechanical and electrical properties.

In China. The Shanghai Transrapid is the third commercially operated magnetic levitation line in history, after the British Birmingham Maglev and the German M-Bahn, and the first commercial high-speed maglev. With the maximum normal operation speed of 431 km/h, it is the fastest commercial high-speed electric train in the world.

Grand Tourer Injection. A Grand Tourer Injection (from Italian Gran Turismo Iniezione) - abbreviated to GTI is a fuel-injection car model variant. Traditionally used for Grand Tourer cars, the term is now applied to various hot hatchbacks, even though they do not have the luxury traditionally associated with Grand Tourers. The 1961 Maserati 3500 GTI is the first car to use the GTI name that was later made famous in 1976 with the Volkswagen Golf GTI and also by the Peugeot 205 GTi launched in 1984.

Moving at high speed. A supercavitating torpedo is a torpedo using the effect of supercavitation to create a bubble around the torpedo to move at high velocity under water; up to 370 km / h. The disadvantage of such torpedoes is its exceptionally loud work and difficult maneuvering. Current applications of cavitation effects are mainly limited to projectiles or fast supercavitating torpedoes, and some propellers, but in principle the technique could be extended to include entire vehicles.

Buran (Snowstorm or Blizzard) was the first spaceplane to be produced as part of the Soviet Buran programme. OK-1K1 completed one unmanned spaceflight in 1988, and was destroyed in 2002 It remains the only Soviet reusable spacecraft to be launched into space.

Argentina maintains the most permanent polar stations - 6, Chile - 5, Russia - 5.

IBM American company, which is one of the oldest IT companies in the world - developed many key technologies used in computer science, like hard drive, cursor, floppy disk.

Ctesibius or Ktesibios or Tesibius was a Greek inventor and mathematician in Alexandria, Ptolemaic Egypt. He wrote the first treatises on the science of compressed air and its uses in pumps (and even cannons). This, in combination with his work on the elasticity of air, earned him the title of "father of pneumatics."

During production of steel. The Bessemer bulb is a cylindrical refractory vessel used to make steel from pig iron. The process is named after its developer Henry Bessemer, who published it in England after the mid-19th century. The Bessemer process was the first inexpensive industrial process for the mass production of steel from molten pig iron before the development of the open hearth furnace.

Iron carbide . Cementite (or iron carbide) is a compound of iron and carbon, more precisely an intermediate transition metal carbide with the formula Fe3C. By weight, it is 6.67% carbon and 93.3% iron. It has an orthorhombic crystal structure.