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  2. Air pump - Wikipedia

    en.wikipedia.org/wiki/Air_pump

    Boyle's air pump. An air pump is a pump for pushing air. Examples include a bicycle pump, pumps that are used to aerate an aquarium or a pond via an airstone; a gas compressor used to power a pneumatic tool, air horn or pipe organ; a bellows used to encourage a fire; a vacuum cleaner and a vacuum pump. All air pumps contain a part that moves ...

  3. Liquid-ring pump - Wikipedia

    en.wikipedia.org/wiki/Liquid-ring_pump

    Single-stage vacuum pumps typically produce vacuum to 35 torr (mm Hg) or 47 millibars (4.7 kPa), and two-stage pumps can produce vacuum to 25 torr, assuming air is being pumped and the ring-liquid is water at 15 °C (59 °F) or less. Dry air and 15 °C sealant-water temperature is the standard performance basis, which most manufacturers use for ...

  4. Turbomolecular pump - Wikipedia

    en.wikipedia.org/wiki/Turbomolecular_pump

    Most turbomolecular pumps employ multiple stages, each consisting of a quickly rotating rotor blade and stationary stator blade pair. The system is an axial compressor that puts energy into the gas, rather than a turbine, which takes energy out of a moving fluid to create rotary power, thus "turbomolecular pump" is a misnomer.

  5. You can get a lightweight, cordless stick vacuum on sale for ...

    www.aol.com/lifestyle/lightweight-cordless-stick...

    DBPower Portable Car Jump Starter. ... See at Amazon. VacLife Portable Air Compressor. $26 $45 Save $19 with coupon. See at Amazon. Stalwart Heated Car Blanket. ... Inse Cordless Stick Vacuum ...

  6. A perfect last-minute gift, this lightweight stick vacuum is ...

    www.aol.com/lifestyle/a-perfect-last-minute-gift...

    With a 600W motor and 18,000pa suction, this Inse vacuum will make quick work of sucking up crumbs, dirt, dust and pet hair from your floors and furniture. And at just 3.3 pounds, you won't resent ...

  7. Vacuum tube battery - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube_battery

    Eveready 761 "C" battery with 4.5-volt, 3-volt, 1.5-volt tap screw terminals. The "C" battery is used to provide bias to the control grid. Until the early 1930s this was common practice in valve (tube) radio sets but was largely superseded by grid leak resistors or voltage divider biasing. Because the tube grids draw no current, the "C" battery ...