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  2. T-35 - Wikipedia

    en.wikipedia.org/wiki/T-35

    The T-35 was a Soviet multi-turreted heavy tank of the interwar period and early Second World War that saw limited service with the Red Army.Often called a land battleship, it was the only five-turreted heavy tank in the world to reach production, but proved to be slow and mechanically unreliable.

  3. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    Fluorescent lamps in various embodiments. Since their introduction as a commercial product in 1939, many different types of fluorescent lamp have been introduced. Systematic nomenclature identifies mass-market lamps as to overall shape, power rating, length, color, and other electrical and illuminating characteristics.

  4. Tung-Sol - Wikipedia

    en.wikipedia.org/wiki/Tung-Sol

    Tung-Sol was producing replacement equipment lamps for Atlas Supply Company and identification was embossed with their logo above "SEALED BEAM" as differentiating from the Westinghouse and General Electric produced lamps with Atlas name. A top most number as 1 indicates a high beam lamp and a 2 indicates a low or twin beam lamp.

  5. Phase-out of incandescent light bulbs - Wikipedia

    en.wikipedia.org/wiki/Phase-out_of_incandescent...

    60 W incandescent light bulb with energy efficiency class E Equivalent 42 W halogen incandescent light bulb with efficiency class C Compact fluorescent lamp LED lamp circa 2021. Various governments have passed legislation to phase out manufacturing or importation of incandescent light bulbs for general lighting in favor of more energy-efficient ...

  6. Tungsram - Wikipedia

    en.wikipedia.org/wiki/Tungsram

    The name "Tungsram" is a portmanteau of tungsten (/ ˈ t ʌ ŋ s t ən / TUNG-stən) and wolfram (/ ˈ w ʊ l f r əm / WUUL-frəm), the two common names of the metal used for making light bulb filaments. Before becoming nationalized by the Communist government in 1945, the company was the world's third largest manufacturer of light bulbs and ...

  7. T35 - Wikipedia

    en.wikipedia.org/wiki/T35

    Tools. Tools. move to sidebar hide. Actions Read; Edit; View history; General ... T35, a prototype for the American M10 tank destroyer; T35 Hosting, a web hosting service

  8. Flashlight - Wikipedia

    en.wikipedia.org/wiki/Flashlight

    Miniature incandescent bulbs for use in flashlights: The tungsten filament bulb was essential to turn the flashlight from a novelty to a useful tool. Incandescent flashlights use incandescent light bulbs, which consists of a glass bulb and a tungsten filament. The bulbs are under vacuum or filled with argon, krypton, or xenon.

  9. Douglas Mark III - Wikipedia

    en.wikipedia.org/wiki/Douglas_Mark_III

    The Douglas T35 used the same flat-twin 350 cc as the generator, mounted in a duplex fame with torsion bar rear suspension. [4] The T35 was an unexpected export success; 1947 factory records show them being exported to Canada , Switzerland , Belgium , Santiago , and Russia .