medium pump

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• Active laser medium — The active laser medium or gain medium is the source of optical gain within a laser. The gain results from the stimulated emission of electronic or molecular transitions to a lower energy state from a higher energy statepreviously populated by a… …   Wikipedia

• Centrifugal pump — Warman centrifugal pump in a coal preparation plant application A centrifugal pump is a rotodynamic pump that uses a rotating impeller to create flow by the addition of energy to a fluid. Centrifugal pumps are commonly used to move liquids… …   Wikipedia

• Geothermal heat pump — A geothermal heat pump system is a heating and/or an air conditioning system that uses the Earth s ability to store heat in the ground and water thermal masses. These systems operate based on the stability of underground temperatures: the ground… …   Wikipedia

• Progressive cavity pump — A progressive cavity pump is also known as a progressing cavity pump, eccentric screw pump or even just cavity pump and, as is common in engineering generally, these pumps can often be referred to by using a genericized trademark. Hence names can …   Wikipedia

• spectator pump — noun a woman s pump with medium heel; usually in contrasting colors for toe and heel (Freq. 1) • Syn: ↑spectator • Hypernyms: ↑pump * * * noun see spectator I, 2 * * * a woman s spectator shoe, closed at the front and back, usually having a… …   Useful english dictionary

• Heat pump —   1) (air source)   An air source heat pump is the most common type of heat pump. The heat pump absorbs heat from the outside air and transfers the heat to the space to be heated in the heating mode. In the cooling mode the heat pump absorbs heat …   Energy terms

• Hydraulic pump — A Hydraulic is used in hydraulic drive systems.Hydraulic pumps can be hydrostatic or hydrodynamic.Hydrostatic pumps are positive displacement pumps.Hydrostatic pumps can be fixed displacement pumps, in which the displacement (flow through the… …   Wikipedia

• Circulator pump — A circulator pump is a specific type of pump used to circulate gases, liquids, or slurries in a closed circuit. They are commonly found circulating water in a hydronic heating or cooling system. Because they only circulate liquid within a closed… …   Wikipedia

• sodium-potassium pump — ▪ biology       in cellular physiology, a protein that has been identified in many cells that maintains the internal concentration of potassium ions [K+] higher than that in the surrounding medium (blood, body fluid, water) and maintains the… …   Universalium

• Contrast medium — A medical contrast medium (or contrast agent) is a substance used to enhance the contrast of structures or fluids within the body in medical imaging.[1] It is commonly used to enhance the visibility of blood vessels and the gastrointestinal tract …   Wikipedia

• spectator pump — a woman s spectator shoe, closed at the front and back, usually having a medium or medium high heel. * * * …   Universalium