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  2. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    3.2.1.5 Phototubes and photomultipliers. 3.2.1.6 Voltage stabilizers. ... Continuously transmitting tubes: Maximum anode dissipation in W or kW in Class-C amplifier ...

  3. Feeding tube - Wikipedia

    en.wikipedia.org/wiki/Feeding_tube

    A feeding tube is a medical device used to provide nutrition to people who cannot obtain nutrition by mouth, are unable to swallow safely, or need nutritional supplementation. The state of being fed by a feeding tube is called gavage, enteral feeding or tube feeding. Placement may be temporary for the treatment of acute conditions or lifelong ...

  4. EL34 - Wikipedia

    en.wikipedia.org/wiki/EL34

    The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, which was owned by Philips. [1] The EL34 has an octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between ...

  5. Vacuum tube - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube

    Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] thermionic valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.

  6. Baby bottle - Wikipedia

    en.wikipedia.org/wiki/Baby_bottle

    [118] [114] [111] During the 1890s, at a time when England's childhood mortality rates (ages 1-5) were declining, infant mortality rates actually rose. [119] [120] A bottle with a long Indian rubber tube ending in a teat remained popular until the 1920s because even very young babies could feed independently. The feeding tubes could be bought ...

  7. Dialysis tubing - Wikipedia

    en.wikipedia.org/wiki/Dialysis_tubing

    Dialysis tubing. Dialysis tubing, also known as Visking tubing, is an artificial semi-permeable membrane tubing [1] used in separation techniques, that facilitates the flow of tiny molecules in solution based on differential diffusion.