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2. The Churchill Machine Tool Company - Wikipedia

   en.wikipedia.org/wiki/The_Churchill_Machine_Tool...

   The 1915 Post Office Directory for London listed Charles Churchill & Co Ltd trading from 9 – 15 Leonard Street EC (Finsbury) in various categories: under "Emery Wheel and Machinery Makers" as agents for Norton & Co of Worcester, Massachusetts; under "Engineers' Machine Tool Makers", "Merchants – American", "Merchants – General ...

3. Aluminium–magnesium–silicon alloys - Wikipedia

   en.wikipedia.org/wiki/Aluminium–magnesium...

   The AlMgSi alloys are therefore understood in the standards as a separate group (6000 series) and not as a subgroup of aluminum-magnesium alloys that cannot be hardenable. AlMgSi is one of the aluminum alloys with medium to high strength, high fracture resistance, good welding suitability, corrosion resistance and formability. They can be ...

4. List of French inventions and discoveries - Wikipedia

   en.wikipedia.org/wiki/List_of_French_inventions...

   France has a long history of innovation and scientific discovery, contributing to various fields such as physics, mathematics, engineering, medicine, and the arts. French inventors and scientists have pioneered breakthroughs that shaped the modern world, from the development of photography and the metric system to advancements in aviation, nuclear physics, and immunology.

5. Brewster F2A Buffalo - Wikipedia

   en.wikipedia.org/wiki/Brewster_F2A_Buffalo

   Fuselage armament was one fixed .50 in (12.7 mm) M2 Browning machine gun with 200 rounds and one fixed .30 in (7.62 mm) AN Browning machine gun with 600 rounds, both in the nose. [ N 1 ] The Navy awarded Brewster Aeronautical Corporation a production contract for 54 aircraft, the F2A-1s .

6. History of the steel industry (1850–1970) - Wikipedia

   en.wikipedia.org/wiki/History_of_the_steel...

   Steel is an alloy composed of between 0.2 and 2.0 percent carbon, with the balance being iron. From prehistory through the creation of the blast furnace, iron was produced from iron ore as wrought iron, 99.82–100 percent Fe, and the process of making steel involved adding carbon to iron, usually in a serendipitous manner, in the forge, or via the cementation process.

7. Lavochkin-Gorbunov-Gudkov LaGG-3 - Wikipedia

   en.wikipedia.org/wiki/Lavochkin-Gorbunov-Gudkov...

   The 8th Series reduced the armament of the LaGG-3 by removing the two cowl mounted ShKAS machine guns and standardizing on the axially mounted ShVAK and one Berezin machine gun. The ShKAS machine guns were removed because they were believed to be dead weight because the 7.62 mm only caused minor damage to control surfaces, oil coolers, and ...