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  2. User guide - Wikipedia

    en.wikipedia.org/wiki/User_guide

    The user guide engraved into a model of the Antikythera Mechanism. User guides have been found with ancient devices. One example is the Antikythera Mechanism, [1] a 2,000 year old Greek analogue computer that was found off the coast of the Greek island Antikythera in the year 1900. On the cover of this device are passages of text which describe ...

  3. Smog tower - Wikipedia

    en.wikipedia.org/wiki/Smog_tower

    There are air pollution experts who view smog filtration tower projects with scepticism. For example, Professor Alastair Lewis , Science Director at the NCAS , has argued that static air cleaners, like the prototypes in Beijing and Delhi, cannot process enough city air, quickly enough, to make a meaningful difference to urban pollution.

  4. Air-free technique - Wikipedia

    en.wikipedia.org/wiki/Air-free_technique

    An ordinary glovebox, showing the two gloves for manipulation, with airlock on the right. The most straightforward type of air-free technique is the use of a glovebox.A "glove bag" uses the same idea, but is usually a poorer substitute because it is more difficult to purge, and less well sealed.

  5. Air purifier - Wikipedia

    en.wikipedia.org/wiki/Air_purifier

    An air purifier or air cleaner is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics , and at reducing or eliminating second-hand tobacco smoke .

  6. Airless tire - Wikipedia

    en.wikipedia.org/wiki/Airless_tire

    Bridgestone is developing the Bridgestone Air-Free Concept Tire, which can hold 150 kg (330 lb) per tire. [13] The Energy return wheel (ERW) has the outer edge of the tire connected to the inner rim by a system of springs. The springs can have their tension changed to vary the handling characteristics. [14] Hankook is developing the iFlex ...

  7. Tulip mania - Wikipedia

    en.wikipedia.org/wiki/Tulip_mania

    Using data about the specific payoffs present in the forward and options contracts, Thompson argued that tulip bulb contract prices hewed closely to what a rational economic model would dictate: "Tulip contract prices before, during, and after the 'tulipmania' appear to provide a remarkable illustration of efficient market prices."

  8. Supplied-air respirator - Wikipedia

    en.wikipedia.org/wiki/Supplied-air_respirator

    [3] [4] It is important that they deliver good air; contaminants (which may also be introduced by faulty operation of the machinery) can be dangerous. [3] If the air-supply line is cut or pinched shut, the user will not have any air to breathe. SAR users therefore often carry a small backup air tank (called an auxiliary escape cylinder [4]).

  9. The Anatomy Lesson of Dr. Nicolaes Tulp - Wikipedia

    en.wikipedia.org/wiki/The_Anatomy_Lesson_of_Dr...

    The Anatomy Lesson of Dr. Nicolaes Tulp is a 1632 oil painting on canvas by Rembrandt housed in the Mauritshuis museum in The Hague, the Netherlands.It was originally created to be displayed by the Surgeons Guild in their meeting room. [1]

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