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  2. Suck up massive these savings on vacuums at Walmart ... - AOL

    www.aol.com/lifestyle/walmart-shark-days-vacuum...

    Shark Cordless Pro Stick Vacuum with Clean Sense IQ Technology, Power Fins PLUS Brushroll, Crevice Tool Included, HEPA Filtration, IZ540H $290 $299 Save $9 See at Walmart

  3. This bestselling 'lightweight but sturdy' Shark vacuum is ...

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    Walmart's amazing sale on the Shark Navigator has the vacuum marked down to just $97, which means it's over half off its usual price — we haven't seen this fan-favorite cleaner this low in ...

  4. Walmart is having a major sale on Dyson vacuums - AOL

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    Type: Cordless stick Color options: Gold Weight: 6.83 pounds Yes, the Dyson V15 Detect Absolute is the priciest vacuum on the list, but it comes with so many new and improved fixings.

  5. Vacuum pump - Wikipedia

    en.wikipedia.org/wiki/Vacuum_pump

    In the field of oil regeneration and re-refining, vacuum pumps create a low vacuum for oil dehydration and a high vacuum for oil purification. [44] A vacuum may be used to power, or provide assistance to mechanical devices. In hybrid and diesel engine motor vehicles, a pump fitted on the engine (usually on the camshaft) is

  6. Diffusion pump - Wikipedia

    en.wikipedia.org/wiki/Diffusion_pump

    An oil diffusion pump is used to achieve higher vacuum (lower pressure) than is possible by use of positive displacement pumps alone. Although its use has been mainly associated within the high-vacuum range, down to 1 × 10 −9 mbar (1 × 10 −7 Pa), diffusion pumps today can produce pressures approaching 1 × 10 −10 mbar (1 × 10 −8 Pa) when properly used with modern fluids and accessories.

  7. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics.