zoned vacuum back - meaning and definition. What is zoned vacuum back
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What (who) is zoned vacuum back - definition

HYPOTHETICAL VACUUM, LESS STABLE THAN TRUE VACUUM
Quantum Vacuum Collapse; Vacuum decay; Vacuum metastability disaster; Vacuum metastability event; Bubble nucleation; Vacuum collapse; Quantum vacuum collapse; Vacuum instability; True vacuum; False vacuum collapse; Collapse of the vacuum; False vacuum catastrophe; Electroweak vacuum; Higgs vacuum; False vacuum; Entropy bubble
  • quantum-mechanical tunneling]].
  • Electroweak vacuum stability landscape as estimated in 2012<ref name="Alekhin 2012" />

vacuum cleaner         
  • Train-mounted vacuum system for track cleaning (France)
  • Wet/dry vacuum for home use
  • The power unit of a typical [[central vacuum cleaner]] for residential use
  • isbn=9780786465521}}</ref>
  • A typical low-cost upright vacuum
  • Patent model of Daniel Hess's carpet sweeper
  • Hoover Constellation of 1960
  • Astronaut [[Tracy Caldwell Dyson]] vacuums equipment on the [[International Space Station]]
  • Kirby]] G5 vacuum cleaner
  • Early electric vacuum cleaner by Electric Suction Sweeper Company, {{circa}} 1908
  • A [[Mid-century modern]] styled canister vacuum
  • USB-powered hand-held vacuum cleaner (promotional giveaway).
  • An early hand-pumped vacuum cleaner
  • Housemaid]] using "dedusting pump", {{Circa}} 1906.
  • A hand-powered pneumatic vacuum cleaner, {{circa}} 1910. An early electric-powered model is also shown
  • A full dustbag. The frame around the opening fastens to the interior end of the cleaner's hose inlet.
DEVICE THAT SUCKS UP DUST AND DIRT FROM FLOORS
Vacuum Cleaner; Vacuum cleaners; Vacuum Cleaners; Wet/dry vacuum; Hoovering; Vaccum cleaner; Dust sucker; Vacuumming; Vacuum cleaning; Vacuum sweeper; Vacuum belt; Vacuum filter; Vacuum Filter; Vacuum machine; Daniel Hess; Hoover Constellation; Shop vac; Shop-vac; Shop Vac; Shop-Vac; Shop vacuum; Shop vacuum cleaner; Vaccuum cleaner; Hoover (vacuum cleaner); Cyclonic vacuum cleaner; Vacuuming; Kruimeldief; Kruimeltjesdief
also vacuum-cleaner (vacuum cleaners)
A vacuum cleaner or a vacuum is an electric machine which sucks up dust and dirt from carpets.
N-COUNT
Vacuum engineering         
TECHNOLOGY TO LOWER GAS PRESSURES FOR VARIOUS TECHNICAL AND SCIENTIFIC PURPOSES
Vacuum equipment; Vacuum system
Vacuum engineering deals with technological processes and equipment that use vacuum to achieve better results than those run under atmospheric pressure. The most widespread applications of vacuum technology are:
Vacuum sewer         
  • Vacuum station in Hooper, Utah
  • A [[vacuum toilet]] at [[Lau Fau Shan]] Roundabout in [[Hong Kong]]
  • Vacuum toilet on a train
  • A vacuum station for a student [[dorm]] in [[Norway]], providing suction for all the vacuum toilets in the dorm
  • A side road in [[Flavigny-sur-Ozerain]] where it would be difficult to install a conventional gravity sewer
  • Minimal disruption for vacuum sewers
  • A portable vacuum sewer system on the underside of a train carriage, serving the vacuum toilet and sink inside the train
METHOD OF TRANSPORTING SEWAGE FROM ITS SOURCE TO A SEWAGE TREATMENT PLANT
Vacuum sewerage; Vacuum flush
A vacuum sewer or pneumatic sewer system is a method of transporting sewage from its source to a sewage treatment plant. It maintains a partial vacuum, with an air pressure below atmospheric pressure inside the pipe network and vacuum station collection vessel.

Wikipedia

False vacuum decay

In quantum field theory, a false vacuum is a hypothetical vacuum that is relatively stable, but not in the most stable state possible. This condition is known as metastable. It may last for a very long time in that state, but could eventually decay to the more stable state, an event known as false vacuum decay. The most common suggestion of how such a decay might happen in our universe is called bubble nucleation – if a small region of the universe by chance reached a more stable vacuum, this "bubble" (also called "bounce") would spread.

A false vacuum exists at a local minimum of energy and is therefore not completely stable, in contrast to a true vacuum, which exists at a global minimum and is stable.