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  2. Polycarbonate - Wikipedia

    en.wikipedia.org/wiki/Polycarbonate

    Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.

  3. Steelmaking - Wikipedia

    en.wikipedia.org/wiki/Steelmaking

    Steelmaking is the process of producing steel from iron ore and/or scrap. Steel has been made for millennia, and was commercialized on a massive scale in the 1850s and 1860s, using the Bessemer and Siemens-Martin processes. Two major commercial processes are used. Basic oxygen steelmaking uses liquid pig-iron from a blast furnace and scrap ...

  4. Twinwall plastic - Wikipedia

    en.wikipedia.org/wiki/Twinwall_plastic

    Twinwall plastic most commonly refers to two exterior plastic sheets that are connected with a plastic support layer to create parallel channels. This design adds both impact toughness and the ability to support weight. Twinwall plastic may also be used to describe a pipe that has a smooth interior with exterior air filled ridges. [3]

  5. Glass-to-metal seal - Wikipedia

    en.wikipedia.org/wiki/Glass-to-metal_seal

    Uranium glass used as lead-in seals in a vacuum capacitor. Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass-encapsulated semiconductor diodes, reed switches, glass windows in metal cases, and metal or ceramic packages of ...

  6. Bakelite - Wikipedia

    en.wikipedia.org/wiki/Bakelite

    Bakelite was produced for the first time in 1872 by Adolf von Baeyer, though its use as a commercial product was not considered at the time. [6]Leo Baekeland was already wealthy due to his invention of Velox photographic paper when he began to investigate the reactions of phenol and formaldehyde in his home laboratory.

  7. History of the iron and steel industry in the United States

    en.wikipedia.org/wiki/History_of_the_iron_and...

    A problem of coke was that it carried impurities such as sulfur, which degraded the quality of the steel. Although coke quickly became the dominant fuel for iron-smelting, in 1884 charcoal was still used to make ten percent of iron and steel in the US. The use of charcoal for steelmaking survived in the US on a small scale until 1945.

  8. US Steel, once a symbol of America’s economic might, is now ...

    www.aol.com/us-steel-once-symbol-america...

    One pioneer of this mini-mill technology, Charlotte-based Nucor has a market capitalization of $42.3 billion compared to US Steel’s value of just over $7 billion.

  9. Carbonyl metallurgy - Wikipedia

    en.wikipedia.org/wiki/Carbonyl_metallurgy

    Iron carbonyl is stable as iron pentacarbonyl, where five carbon monoxide molecules are pendently bonded to the iron atom, while nickel carbonyl is stable as nickel tetracarbonyl, which has four carbon monoxide molecules pendantly bonded [jargon] to the nickel atom. Both can be formed by the exposure of the powdered metal to carbon monoxide gas ...

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