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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. 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 ...

4. Firing pin - Wikipedia

   en.wikipedia.org/wiki/Firing_pin

   The typical firing pin is a thin, simple rod with a hardened, rounded tip that strikes and crushes the primer. The rounded end ensures the primer is indented rather than pierced (to contain propellant gasses). It sits within a hole through the breechblock and is struck by the hammer when the trigger is "pulled". A light firing-pin spring is ...

5. Turbopump - Wikipedia

   en.wikipedia.org/wiki/Turbopump

   A turbopump is a propellant pump with two main components: a rotodynamic pump and a driving gas turbine, usually both mounted on the same shaft, or sometimes geared together. They were initially developed in Germany in the early 1940s. The purpose of a turbopump is to produce a high-pressure fluid for feeding a combustion chamber or other use ...

6. Bill Belichick reportedly wants to return to coaching in 2025 ...

   www.aol.com/sports/bill-belichick-reportedly...

   Bill Belichick has spent a lot of time talking into a microphone about football this season, but he has his sights set higher for next year. According to The Athletic, Belichick wants to return to ...

7. Rope start - Wikipedia

   en.wikipedia.org/wiki/Rope_start

   Starting a Lazair II ultralight aircraft's JPX PUL 425 engine, equipped with a recoil starter. A rope start device housed in a Nose bullet of a Junkers Jumo 004 turbojet.. Rope start (also called pull start [citation needed] or rewind start [citation needed]) is a method of starting an internal combustion engine, usually on small machines, such as lawn mowers, chainsaws, grass trimmers ...