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  2. Equianalgesic - Wikipedia

    en.wikipedia.org/wiki/Equianalgesic

    An equianalgesic chart can be a useful tool, but the user must take care to correct for all relevant variables such as route of administration, cross tolerance, half-life and the bioavailability of a drug. [5] For example, the narcotic levorphanol is 4–8 times stronger than morphine, but also has a much longer half-life. Simply switching the ...

  3. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    Hardness Conversion Table – Brinell, Rockwell,Vickers – Various steels . (archived November 11, 2011) Rockwell to Brinell conversion chart (Brinell, Rockwell A,B,C) Struers hardness conversion table (Vickers, Brinell, Rockwell B,C,D)

  4. List of IEC standards - Wikipedia

    en.wikipedia.org/wiki/List_of_IEC_standards

    IEC 61322 Radiation protection instrumentation – Installed dose equivalent rate meters, warning assemblies and monitors for neutron radiation of energy from thermal to 15 MeV IEC 61325 Insulators for overhead lines with a nominal voltage above 1000 V – Ceramic or glass insulator units for d.c. systems – Definitions, test methods and ...

  5. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    Disposable equivalent of the Nikon EN-EL5 Li-ion rechargeable camera battery. [141] 7R31: Kodak K 7R31 538 4 (mercury) 4.5 (alkaline) Cartridge Negative along the side of the body; positive on the front, nose of the battery Approx: H: 11 mm L: 40 mm W: 16 mm Typically a cartridge of three mercury button cells for use in 110 format cameras.

  6. Beryllium copper - Wikipedia

    en.wikipedia.org/wiki/Beryllium_copper

    Beryllium copper is a ductile, weldable, and machinable alloy.Like pure copper, it is resistant to non-oxidizing acids (such as hydrochloric acid and carbonic acid) and plastic decomposition products, [further explanation needed] to abrasive wear, and to galling.

  7. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    A few special-quality tubes did not have a standard equivalent, e.g. the E55L, a broadband power pentode used as the output stage of oscilloscope amplifiers and the E90CC, a dual triode with a common cathode connection and seven pin base for use in cathode-coupled Flip-flops in early computers.

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