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  2. Air-line fitting - Wikipedia

    en.wikipedia.org/wiki/Air-line_fitting

    Nipples with mating safety couplings. Also known as pneumatic couplings, quick disconnects, air couplers, quick connect couplers, and quick couplers, hand-operable air-line fittings allow manual disconnection of gas supply lines, including compressed air and breathable air (a subset of breathing gases).

  3. Oxy-fuel welding and cutting - Wikipedia

    en.wikipedia.org/wiki/Oxy-fuel_welding_and_cutting

    A stream of oxygen is then trained on the metal, burning it into a metal oxide that flows out of the kerf as dross. [5] Torches that do not mix fuel with oxygen (combining, instead, atmospheric air) are not considered oxy-fuel torches and can typically be identified by a single tank (oxy-fuel cutting requires two isolated supplies, fuel and ...

  4. Pin Index Safety System - Wikipedia

    en.wikipedia.org/wiki/Pin_Index_Safety_System

    The pin index safety system uses a face seal between the cylinder valve and the associated yoke clamp. There are two holes in specific positions on the cylinder valve body below the outlet port , in positions associated with the gas mixture, which prevent connection of the cylinder to a yoke or pressure regulator with a mis-matched set of pins.

  5. Emergency oxygen system - Wikipedia

    en.wikipedia.org/wiki/Emergency_oxygen_system

    Most commercial aircraft that operate at high flight altitudes are pressurized at a maximum cabin altitude of approximately 8,000 feet. On most pressurized aircraft, if cabin pressurization is lost when the aircraft is flying at an altitude above 4,267 m (14,000 feet), compartments containing the oxygen masks will open automatically, either above or in front of the passenger and crew seats ...

  6. Self-contained breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Self-contained_breathing...

    An open-circuit rescue or firefighting SCBA has a full-face mask, also called the face-piece, a demand regulator, air cylinder, pressure gauge, (sometimes with an integrated PASS device), and a harness with adjustable shoulder straps and waist belt which lets it be worn on the back. The air cylinder is commonly 4 liter, 6 liter, or 6.8 liter ...

  7. U.S. Military connector specifications - Wikipedia

    en.wikipedia.org/wiki/U.S._Military_connector...

    A MIL-DTL-38999 circular connector plated with a nickel–teflon composite. Left: plug (male) type connector; Right: receptacle (female) type connector) Electrical or fiber-optic connectors used by U.S. Department of Defense were originally developed in the 1930s for severe aeronautical and tactical service applications, and the Type "AN" series set the standard for modern military circular ...

  8. 5 investing trends for 2025—and 15 stocks to help you bet on them

    www.aol.com/finance/5-investing-trends-2025-15...

    Consider that a single Google search consumes 0.3 watt-hours of electricity, according to the International Energy Agency, but a similar query on OpenAI takes 2.9 wh. And then there are electric ...

  9. Quick connect fitting - Wikipedia

    en.wikipedia.org/wiki/Quick_connect_fitting

    Single Shut-Off Couplings: Have a valve on one side to prevent air loss when disconnected. Double Shut-Off Couplings : Both sides contain shut-off valves to minimize air loss. Straight-Through Couplings : No valves, allowing unrestricted airflow for maximum efficiency.