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2. Vacuum interrupter - Wikipedia

   en.wikipedia.org/wiki/Vacuum_interrupter

   Vacuum interrupter with ceramic housing. In electrical engineering, a vacuum interrupter is a switch which uses electrical contacts in a vacuum. It is the core component of medium-voltage circuit-breakers, generator circuit-breakers, and high-voltage circuit-breakers.

3. List of vacuum tubes - Wikipedia

   en.wikipedia.org/wiki/List_of_vacuum_tubes

   4.12 50 volt series heater tubes. ... This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, ...

4. Pressure switch - Wikipedia

   en.wikipedia.org/wiki/Pressure_switch

   Industrial pressure switches may have a calibrated scale and pointer to show the set point of the switch. A pressure switch will have a hysteresis, that is, a differential range around its setpoint, known as the switch's deadband, inside which small changes of pressure do not influence the state of the contacts. Some types allow adjustment of ...

5. Sulfur hexafluoride circuit breaker - Wikipedia

   en.wikipedia.org/wiki/Sulfur_hexafluoride...

   Generator circuit breaker rated for 17.5 kV and 63 kA. Generator circuit breakers (GCB) are connected between a generator and the step-up voltage transformer. They are generally used at the outlet of high-power generators (30 MVA to 1800 MVA) in order to protect them in a reliable, fast and economic manner.

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Vacuum pump - Wikipedia

   en.wikipedia.org/wiki/Vacuum_pump

   The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity. [1]

8. Today's Wordle Hint, Answer for #1262 on Monday ... - AOL

   www.aol.com/todays-wordle-hint-answer-1262...

   37 photos of the weirdest and most unique McDonald's restaurants in the world. Lighter Side. USA TODAY 'Walmart Birkin' goes viral: What to know about Hermès Birkin bags, $78 dupe. News. News.

9. The NBA has a 'missing stars' problem with injuries piling up ...

   www.aol.com/sports/nba-missing-stars-problem...

   As players suffer, so does the product. The injury problem looms large in the audience data. According to Sports Media Watch tracking, ESPN games in the opening weeks of the season have seen a 34% ...