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2. Pumpjack - Wikipedia

   en.wikipedia.org/wiki/Pumpjack

   A diagram of a pumpjack. A pumpjack is the overground drive for a reciprocating piston pump in an oil well. [1]It is used to mechanically lift liquid out of the well if there is not enough bottom hole pressure for the liquid to flow all the way to the surface.

3. Air lock - Wikipedia

   en.wikipedia.org/wiki/Air_lock

   Air lock problems often occur when one is trying to recommission a system after it has been deliberately (for servicing) or accidentally emptied. Take, for example, a central heating system using a circulating pump to pump water through radiators. When filling such a system, air is trapped in the radiators. This air has to be vented using screw ...

4. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.

5. AOL Help

   help.aol.com

   Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

6. 7 major questions about alcohol and cancer: What doctors ...

   www.aol.com/surgeon-generals-suggestion-put...

   The Summary. A report from the U.S. surgeon general suggested that labels on alcoholic drinks should warn about cancer risk. Doctors expressed their agreement.

7. 3 firefighters, 12 passengers hurt after Brightline train ...

   www.aol.com/news/brightline-train-collides-fire...

   Three firefighters and 12 train passengers were hospitalized after a Brightline train crashed with a fire truck in crowded downtown Delray Beach late Saturday morning. The crash took place about ...

8. Centrifugal pump - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_pump

   Warman centrifugal pump in a coal preparation plant application A pair of centrifugal pumps for circulating hot water within a hydronic heating system. Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine ...

9. Why has ISIS not yet claimed the New Orleans vehicle attack?

   www.aol.com/why-isis-not-yet-claimed-124447285.html

   A black flag with white lettering lies rolled up on the ground behind the vehicle used in the New Orleans attack. The FBI said it recovered an ISIS flag, which is black with white lettering, from ...