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2. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation.

3. Components of jet engines - Wikipedia

   en.wikipedia.org/wiki/Components_of_jet_engines

   There may be as many as three concentric shafts, rotating at independent speeds, with as many sets of turbines and compressors. Cooling air for the turbines may flow through the shaft from the compressor. Diffuser section: - The diffuser slows down the compressor delivery air to reduce flow losses in the combustor.

4. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure from water leaving the system can slow flow (resulting in clogs) or cause a siphon to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.

5. Analytical nebulizer - Wikipedia

   en.wikipedia.org/wiki/Analytical_nebulizer

   A teflon PFA concentric nebulizer. A Meinhard glass concentric nebulizer. Concentric nebulizers have a central capillary with the liquid and an outer capillary with the gas. The gas draws the liquid into the gas stream through induction, and the liquid is broken into a fine mist as it moves into the gas stream.

6. Oregon St. claims Pac-12 'title' and snaps a 5-game skid with ...

   www.aol.com/oregon-st-claims-pac-12-035817759.html

   With a 55-yard field goal to cap a wild back-and-fourth game, Oregon State emerged as this season's de facto Pac-12 champions. Everett Hayes kicked a season-best 55-yard field goal with 20 seconds ...

7. Concentric tube heat exchanger - Wikipedia

   en.wikipedia.org/wiki/Concentric_tube_heat_exchanger

   Concentric Tube (or Pipe) Heat Exchangers are used in a variety of industries for purposes such as material processing, food preparation, and air-conditioning. [1] They create a temperature driving force by passing fluid streams of different temperatures parallel to each other, separated by a physical boundary in the form of a pipe.