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  2. Heated hose - Wikipedia

    en.wikipedia.org/wiki/Heated_hose

    [1] [2] Heated hoses are suitable for environments from -40°C to 80°C and can be used in explosion-proof zones 1/21 and 2/22, if required. [3] A heated hose consists of a flexible hose, through which the media is pumped. This hose determines the resistance against temperature and chemicals.

  3. Little Professor - Wikipedia

    en.wikipedia.org/wiki/Little_Professor

    As the first electronic educational toy, [6] [7] the Little Professor is a common item on calculator collectors' lists. [8] In 1976, the Little Professor cost less than $20. More than 1 million units sold in 1977. [9]

  4. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    A 46 kW (157,000 BTU/h) heater, as might exist in a tankless heater, would take about 15 minutes to do this. At $1 per therm, the cost of the gas would be about 40 cents. In comparison, a typical 230 L (60 US gal) tank electric water heater has a 4.5 kW (15,000 BTU/h) heating element, which at 100% efficient results in a heating time of about 2 ...

  5. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Kitchens and bathrooms typically have mechanical exhausts to control odors and sometimes humidity. Factors in the design of such systems include the flow rate (which is a function of the fan speed and exhaust vent size) and noise level. Direct drive fans are available for many applications and can reduce maintenance needs.

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  7. Hose - Wikipedia

    en.wikipedia.org/wiki/Hose

    A hose is a flexible hollow tube or pipe designed to carry fluids from one location to another, often from a faucet or hydrant. [ 1 ] Early hoses were made of leather, although modern hoses are typically made of rubber, canvas, and helically wound wire.

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