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  2. Spin coating - Wikipedia

    en.wikipedia.org/wiki/Spin_coating

    Laurell Technologies WS-400 spin coater used to apply photoresist to the surface of a silicon wafer. Spin coating is a procedure used to deposit uniform thin films onto flat substrates. Usually a small amount of coating material in liquid form is applied on the center of the substrate, which is either spinning at low speed or not spinning at all.

  3. Slot-die coating - Wikipedia

    en.wikipedia.org/wiki/Slot-die_coating

    Slot-die coating is a non-contact coating method, in which the slot-die is typically held over the substrate at a height several times higher than the target wet film thickness. [23] The coating fluid transfers from the slot-die to the substrate via a fluid bridge that spans the air gap between the slot-die lips and substrate surface.

  4. Toyota A engine - Wikipedia

    en.wikipedia.org/wiki/Toyota_A_engine

    Due to its durability, performance and relatively low cost, 4A-GE and 4A-GZE engines and their derivatives have been popular for both professional and amateur racing since their introduction. The most notable application of the 4A-GE in racing was as in the Formula Atlantic series, where in full race trim the engine will produce 250 PS (184 kW ...

  5. Williams FJ44 - Wikipedia

    en.wikipedia.org/wiki/Williams_FJ44

    The Williams FJ44 is a family of small, two-spool, turbofan engines produced by Williams International for the light business jet market. Until the recent boom in the very light jet market, the FJ44 was one of the smallest turbofans available for civilian applications.

  6. Fracking proppants - Wikipedia

    en.wikipedia.org/wiki/Fracking_proppants

    A proppant is a solid material, typically sand, treated sand or man-made ceramic materials, designed to keep an induced hydraulic fracture open, during or following a fracturing treatment, most commonly for unconventional reservoirs.

  7. Wella - Wikipedia

    en.wikipedia.org/wiki/Wella

    Wella was founded in 1880 by Franz Ströher, a hairdresser from Saxony, Eastern Germany.The company originally made tulles, the base used for making wigs. In 1890, he invented the Tullemoid Waterproof, a technique that allowed the scalp to breathe.

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