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2. Hydraulic accumulator - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_accumulator

   A hydraulic accumulator is a pressure storage reservoir in which an incompressible hydraulic fluid is held under pressure that is applied by an external source of mechanical energy. The external source can be an engine, a spring , a raised weight , or a compressed gas .

3. Pumped-storage hydroelectricity - Wikipedia

   en.wikipedia.org/wiki/Pumped-storage...

   Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of hydroelectric energy storage used by electric power systems for load balancing. A PSH system stores energy in the form of gravitational potential energy of water, pumped from a lower elevation reservoir to a higher elevation. Low-cost surplus off ...

4. Energy storage - Wikipedia

   en.wikipedia.org/wiki/Energy_storage

   Storage capacity is the amount of energy extracted from an energy storage device or system; usually measured in joules or kilowatt-hours and their multiples, it may be given in number of hours of electricity production at power plant nameplate capacity; when storage is of primary type (i.e., thermal or pumped-water), output is sourced only with ...

5. Specific storage - Wikipedia

   en.wikipedia.org/wiki/Specific_storage

   The specific storage is the amount of water that a portion of an aquifer releases from storage, per unit mass or volume of the aquifer, per unit change in hydraulic head, while remaining fully saturated. Mass specific storage is the mass of water that an aquifer releases from storage, per mass of aquifer, per unit decline in hydraulic head:

6. Bed - Wikipedia

   en.wikipedia.org/wiki/Bed

   An Ottoman bed (in the UK) is a type of storage bed in which the storage area is placed underneath the mattress base and accessed by lifting the hinged mattress frame with the help of a spring or hydraulic mechanism. A pallet is a thin, lightweight mattress.

7. Yaw system - Wikipedia

   en.wikipedia.org/wiki/Yaw_system

   The hydraulic yaw systems often (depending on the system design) also allow for the elimination of the yaw brake mechanism and their replacement with cut-off valves. Gliding yaw bearing - Electric yaw drive : The nacelle is mounted on a friction based gliding bearing and the azimuth rotation is achieved via a plurality of powerful electric drives .

8. We Found Costco's SOLD-OUT Swivel Desk on Amazon for Under $100

   www.aol.com/lifestyle/found-costcos-sold-swivel...

   $84.52 at amazon.com. The Pelham Swivel Desk consists of two compartments joined by a swivel mechanism: one side desk and one storage component with four cubbies. You can rotate the side desk into ...

9. Hydraulic engineering - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_engineering

   Hydraulic Flood Retention Basin (HFRB) View from Church Span Bridge, Bern, Switzerland Riprap lining a lake shore. Hydraulic engineering as a sub-discipline of civil engineering is concerned with the flow and conveyance of fluids, principally water and sewage. One feature of these systems is the extensive use of gravity as the motive force to ...