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2. Primer (firearms) - Wikipedia

   en.wikipedia.org/wiki/Primer_(firearms)

   Primer-actuated cartridges/piston primer cartridges use a primer in the form of a blank to contain the propellant within the cartridge, or as a piston to unlock the bolt and cycle the weapon's operation. Examples are the 9×51mm SMAW, MBA Javette and the M48A2.

3. Rotary vane pump - Wikipedia

   en.wikipedia.org/wiki/Rotary_vane_pump

   An eccentric rotary vane pump Another eccentric rotary-vane pump design. Note that modern pumps have an area contact between rotor and stator (and not a line contact). 1. pump housing 2. rotor 3. vanes 4. spring. A rotary vane pump is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In ...

4. Fire hydrant - Wikipedia

   en.wikipedia.org/wiki/Fire_hydrant

   A fire hydrant, fireplug, firecock (archaic), [1] hydrant riser or Johnny Pump [2] is a connection point by which firefighters can tap into a water supply. It is a component of active fire protection. Underground fire hydrants have been used in Europe and Asia since at least the 18th century. Above-ground pillar-type hydrants are a 19th-century ...

5. White House approves student debt cancellation for thousands ...

   www.aol.com/news/white-house-approves-student...

   One month before President Biden leaves the White House, the Biden administration announced it has forgiven student loan debt for 54,900 public service workers.

6. Primer - Wikipedia

   en.wikipedia.org/wiki/Primer

   Primer (gasoline engine), a device on some petrol engines used to prime the engine with gasoline before starting it; Primer (molecular biology), a nucleic acid strand (or related molecule) that serves as a starting point for replication; Money-creation primer; Trap primer, a plumbing device or valve that adds water to traps

7. Best Buy broadly misses earnings estimates as consumers pull ...

   www.aol.com/finance/best-buy-expected-see...

   Even artificial intelligence couldn't make up for flagging consumer demand at Best Buy ().For the 12th consecutive quarter, the retailer posted negative same-store sales growth, down 2.9% year ...

8. Blowback (firearms) - Wikipedia

   en.wikipedia.org/wiki/Blowback_(firearms)

   In firearms, a blowback system is generally defined as an operating system in which energy to operate the firearm's various mechanisms, and automate the loading of another cartridge, is derived from the inertia of the spent cartridge case being pushed out the rear of the chamber by rapidly expanding gases produced by a burning propellant, typically gunpowder. [3]

9. Still need to buy a Christmas tree? Here's the good news. - AOL

   www.aol.com/news/still-buy-christmas-tree-heres...

   The best books of 2024, according to Goodreads. See all deals. In Other News. Entertainment. Entertainment. Fox News. Jay Leno addresses rumors his facial injuries were related to mob retaliation.