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  2. Air mattress - Wikipedia

    en.wikipedia.org/wiki/Air_mattress

    An air mattress, also known as an airbed or a blow-up bed, [2] is an inflatable mattress made of polyvinyl chloride (PVC) or textile-reinforced urethane plastic or rubber. The deflated mattress can be compacted and carried or stored in a small form. They are inflated by blowing into a valve, either with a manual or an electric pump. Some are ...

  3. Aerovel Corporation - Wikipedia

    en.wikipedia.org/wiki/Aerovel_Corporation

    Aerovel Flexrotor has a flight endurance of more than 32 hours, [7] which is a record-setting Group 2 UAS flight endurance, and a 100-kilometer communications range. It is an all-weather aircraft that has operated in harsh conditions including off of various vessels in the Arctic [ 8 ] and tropics.

  4. Aermotor Windmill Company - Wikipedia

    en.wikipedia.org/wiki/Aermotor_Windmill_Company

    The widespread use of their distinctive wind pumps on ranches throughout the arid plains and deserts of the United States has made their design a quintessential image of the American West. The company also manufactured galvanized steel fire lookout towers including a "7 x 7" model which supported a 7-by-7-foot (2.1 m × 2.1 m) steel cab at ...

  5. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    An air source heat pump can be used to air condition the building during hot weather, and to warm the building using heat extracted from outdoor air in cold weather. Air-source heat pumps are generally uneconomic for outdoor temperatures much below freezing. In colder climates, geothermal heat pumps can be used to extract heat from the ground ...

  6. Circulating fluidized bed - Wikipedia

    en.wikipedia.org/wiki/Circulating_fluidized_bed

    In designing a circulating fluidized bed, with constant temperature distribution for either endothermic or exothermic reactions, in order to determine the appropriate design for cooling or heating of the circulating fluidized bed reactors, a good approximation of heat transfer rates are necessary for better control so that the reactor can ...

  7. Aero Adventure Aventura - Wikipedia

    en.wikipedia.org/wiki/Aero_Adventure_Aventura

    Aventura UL Single seater optimised for the US FAR 103 Ultralight Vehicle category, with an empty weight of 328 lb (149 kg). Engines include the original 28 hp (21 kW) Rotax 277 in early models and the 40 hp (30 kW) Rotax 447 currently. 90 had been completed and flown by the end of 2011.