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  2. API Standard 682 - Wikipedia

    en.wikipedia.org/wiki/API_Standard_682

    API Standard 682, titled "Pumps - Shaft Sealing Systems for Centrifugal and Rotary Pumps," is the American Petroleum Institute standard for end-face mechanical seals. [1] The purpose of API 682 is to assist in the selection and operation of end face mechanical seals in centrifugal pumps. It is based on the combined knowledge and experience of ...

  3. Ballcock - Wikipedia

    en.wikipedia.org/wiki/Ballcock

    When the handle of a flush toilet with a tank (British, cistern) is turned, a discharge mechanism is activated by means of a rod or chain. The mechanism may be a flapper valve, which is designed to sink more slowly than the water - allowing the water to exit to the toilet bowl below, so that the tank may empty.

  4. RPD machine gun - Wikipedia

    en.wikipedia.org/wiki/RPD_machine_gun

    American firearm manufacturer DS Arms makes a semi-auto variant for civil market and a full-auto variant for export, both in the original design and also in a modernized version called RPD Carbine. The RPD Carbine has a fluted 17.5-inch barrel, modern front sight, alloy handguard with rails, M249 -type pistol grip and M4 recoil spring tube and ...

  5. NFL divisional round schedule, playoff bracket: Chiefs, Lions ...

    www.aol.com/sports/nfl-divisional-round-schedule...

    The divisional round of the playoffs is up next. NFL divisional round schedule, playoff bracket: Chiefs, Lions back in action after postseason bye week

  6. Supposed Trump post telling Elon Musk to 'stay in your lane ...

    www.aol.com/supposed-trump-post-telling-elon...

    The claim: Image shows Trump post telling Musk to ‘stay in your lane’ A Dec. 21 Instagram post (direct link, archive link) includes an image that appears to show a Truth Social post from ...

  7. Completion (oil and gas wells) - Wikipedia

    en.wikipedia.org/wiki/Completion_(oil_and_gas_wells)

    It is a cylindrical valve with either a ball or flapper closing mechanism. It is installed in the production tubing and is held in the open position by a high-pressure hydraulic line from surface contained in a 6.35 mm (1/4") control line that is attached to the DHSV's hydraulic chamber and terminated at surface to a hydraulic actuator.