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A vacuum is a volume of space that is substansively empty of matter, so that gaseous pressure is much less than standard atmospheric pressure. The root of the word vacuum is the Latin adjective vacuus which means "empty," but space can never be perfectly empty. A perfect vacuum, known as "free space", with a gaseous pressure of absolute zero is a philosophical concept with no physical reality, not least because quantum theory predicts that no volume of space is perfectly empty in this way. Physicists often use the term "vacuum" slightly differently. They discuss ideal test results that would occur in a perfect vacuum, which they simply call "vacuum" in this context, and use the term partial vacuum to refer to the imperfect vacua realized in practice.
The quality of a vacuum is measured by how closely it approaches a perfect vacuum. The residual gas pressure is the primary indicator of quality, and it is most commonly measured in units of torr, even in metric contexts. Lower pressures indicate higher quality, although other variables must also be taken into account. Quantum mechanics sets limits on the best possible quality of vacuum. Outer space is a natural high quality vacuum, mostly of much higher quality than what can be created artificially with current technology. Low quality artificial vacuums have been used for suction for millenia.
Vacuum has been a common topic of philosophical debate since Ancient Greek times, but it was not studied empirically until the 17th century. Experimental techniques were developed following Evangelista Torricelli's theories of atmospheric pressure. Vacuum became a valuable industrial tool in the 20th century with the introduction of the light bulb and vacuum tube, and a wide array of vacuum technology has since become available. The recent development of human spaceflight has raised interest in the impact of vacuum on human health, and life forms in general.
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ELECTROLUX CENTRAL VACUUM SYSTEMS 15712 ONLY $34.74 AT WWW.SECURITYSYSTEMPLAZA.COM
SecurityPlaza (SecuritySystemPlaza) Thu, 07 Jan 2010 11:57:16 -0000
ELECTROLUX CENTRAL VACUUM SYSTEMS 15712 ONLY $34.74 AT WWW.SECURITYSYSTEMPLAZA.COM
omg best track ever: http://eswarrior.bandcamp.com/track/inner-vacuum-imploding
eswarrior (eswarrior) Thu, 07 Jan 2010 11:56:58 -0000
omg best track ever: http://eswarrior.bandcamp.com/track/inner-vacuum-imploding
Done, it's clean except for Hagan's room. I just need to vacuum but I feel like it's too early for that.
rachell0l (Rachel Gonzales) Thu, 07 Jan 2010 11:56:42 -0000
Done, it's clean except for Hagan's room. I just need to vacuum but I feel like it's too early for that.
Relocation of offices. 12 mi instead of 40 yds now btwn us and dept needing our docs at EOM. Big fiscal liability. Vacuum decision making..
jjdevi (Judy Davie) Thu, 07 Jan 2010 11:52:38 -0000
Relocation of offices. 12 mi instead of 40 yds now btwn us and dept needing our docs at EOM. Big fiscal liability. Vacuum decision making..
@Picklelou Whip out the vacuum and bring on the washing, Ahh hold that thought, that probably wht No.@'s on the way
derestrict (Derek Peter Coetzee) Thu, 07 Jan 2010 11:48:40 -0000
@Picklelou Whip out the vacuum and bring on the washing, Ahh hold that thought, that probably wht No.@'s on the way
Commercial Portapower Vacuum Cleaner, 8.3lbs, Black http://hoover-vacuum-cleaners.info/?p=20
andyshome (Andy Hill) Thu, 07 Jan 2010 11:46:57 -0000
Commercial Portapower Vacuum Cleaner, 8.3lbs, Black http://hoover-vacuum-cleaners.info/?p=20
Appliances, Inc. - Online sale of major brands.
Meta Description: [ Miele, Wap, Alto, Clarke, Lindhaus, Vacuums, Koblenz scrubbers, Vaporetto steam cleaners & Miele appliances ]
Sewing - Offers vacuums, sewing machines, and accessories.
Meta Description: [ Florida Discount Vacuum and Sewing - 877-883-8778 -Miele HEPA filtration vacuum cleaners - Authorized distributor in Miami. Upright, compact vacuum cleaners. Aspiradoras. Also Embroidery machines, sewing, monogramming machines ]
AAA Vacuums - Specializes in vacuum cleaner sales, service, and parts for Miele, Sebo, Hoover, and Eureka. Shipping information included. Hollywood, Florida.
Meta Description: [ AAA Vacuums, Vacuums, Vacuum Cleaners, Central Vacuums, Miele, Sebo, Hoover, Eureka, Miele Appliances, Appliances, Sebo Vacuums, Hoover Vacuums, Eureka Vacuums, Vacuums Online, Uprights, Canisters, Hollywood, South Florida, Broward, Florida, Miami, Service ]
ABC Vacuum - Features sales of Hoover, Samsung and Fantom vacuums and accessories.
Meta Description: [ Visit ABC Vacuum Warehouse for great vacuum cleaners at the lowest possible price, shipped free direct to your door, with the best possible service. We offer special savings on major brand vacuums such as Hoover, Eureka, Fantom, Samsung, Rainbow, and Shop-Vac. It is what we do and have done for ... ]
Best Vacuum - Featuring Miele HEPA filtration vacuum cleaners and Austin Air Filters.
Meta Description: [ Best Vacuum is an authorized dealer of Miele vacuum cleaners and is a Dyson vacuum cleaner specialist. Shop online for SEBO vacuums, and also a wide selection of HEPA air purifier and air filter products. ]
Blue Ridge Vacuums - Authorized Sebo and Miele vacuum cleaner distributor, also offering bags and belts for Bissell, Oreck, Eureka, Hoover, Tri-Star and other vacuum cleaners.
Meta Description: [ Blue Ridge vacuum offers Miele vacuums and sebo vacuums, along with vacuum bags and belts for Hoover, Eureka, Dirt Devil, and Oreck vacuum cleaners. ]
Brazos Distributors, Inc. - Offers a wide variety of brands and styles. Also includes kitchen appliances and electronics.
Meta Description: [ New Vacuum Cleaners on Sale Every Day! Also: Bags, Belts, Filters, Sewing Machines and Electronics. Our web site is Safe, Secure and User Friendly! ]
Carmel Vacuum - California dealer offers 3 vacuum brands.
Meta Description: [ Miele vacuums cleaners, Eureka vacuum cleaners, Sebo vacuum cleaners, Free shipping inside the US. ]
Central Vacuum Stores - Large selection of Central vacuums, hoses, attachments, inlet kits, accessories, filters, and bags.
Meta Description: [ At Central Vacuums Stores, we've been providing our customers with the widest choice of central vacuum systems for over 50 years. We pride ourselves on offering the utmost in customer service and will go beyond the call to make sure the process of purchasing and installing is easy. If you're thin... ]
Central Vacuum Suppliers - Markets, sells and installs built-in central vacuum, security and intercom systems.
Meta Description: [ CVS 1-800-447-2188, distributors,wholesale,central vac, intercoms, alarm, bugular alarm security systems, surround sound systems,telephone systems, music, In-Wall speakers,tvs, direct tv, dish, ipod for russound, CCTV, satilite service, ]
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City Wide Vacuum - Order vacuum bags belts and filters online via secure server.
Meta Description: [ Order Vacuum Bags, Belts, Filters, Parts, and Accessories ONLINE Lowest prices and fastest service.Order Items via secure server, for all brands of vacuum cleaners. We've got it all. ]
Clean Sweep - Upright and built-in systems available.
Meta Description: [ Clean Sweep Vacuums sells Hoover, Dirt Devil, Bissell, Central and Miele Vacuum at affordable prices with top quality service. ]
D J's Vacuums - Carries multiple lines of vacuums and supplies.
DanvacOnline - Offers several brands.
Meta Description: [ Vacuum cleaners sold on the web for low affordable. House Cleaning & Organizing, Bathroom Remodeling, Lawn & Garden, Outdoor Power Equipment, Patio & Grilling, Bedroom Design, Building & Home Repair, Dining & Bar, Electrical & Solar, Food & Wine ]
Dave's Vacuum - Offers vacuum sales, parts, and service including bags and belts for a variety of brands including Eureka, Royal, Hoover, and Regina.
Meta Description: [ DavesVac.com offers vacuum cleaners, vacuum cleaner services and parts all over the US. We have all the latest models from the leading vacuum cleaner brands including Miele, SABO and Hoover vacuum cleaners on most competitive prices. ]
Designer Vac - Offers Miele vacuum cleaners and Blueair air purifiers.
Meta Description: [ Discount TextBooks ]
Discountvac - Offers supplies for many brands.
Meta Description: [ miele vacuums, bissell vacuum, vacuum cleaner belts, nilfisk vacuum, vacuum cleaner filters, eureka vacuum, rainbow vacuum, floor polishers, panasonic vacuum, vacuum cleaner parts, floor buffer ]
Dyson Appliances - Dyson vacuum cleaners and information.
Meta Description: [ Find out about Dyson - the leader in vacuum cleaners. Find out what makes Dyson better and which Dyson is best for you. ]
Dyson Outlet - Offers a variety of canister types and accessories.
Meta Description: [ dyson vacuums and accessories direct from dyson. buy your dyson vacuum and dyson accessories on-line from the dyson outlet. dyson accessories and tools also available. ]
EnTech Supply - Commercial HEPA vacuums for containing asbestos, allergens, lead based paint and hazardous dust.
Meta Description: [ National wholesaler of Pro-Tech carbon monoxide detectors and commercial carbon monoxide monitors, Euroclean HEPA vacuums, and Bacharach CO testers, combustion analyzers and gas leak detectors ]
Fluppi USA - Small, inexpensive, and light cleaning brush with no replaceable parts, power cords, or batteries.
Meta Description: [ Discover Fluppi, the amazingly effective, incredibly simple, and unbelievably easy-to-use brush cleaner from Germany! Clean up messes your vacuum cleaner never could with this small, light, and durable take-anywhere tool. Try it risk-free thanks to our money-back guarantee, lifetime warranty, and... ]
George's Vacuums - Selection of vacuum and hard floor cleaners, central vacuum systems, bags and belts.
Meta Description: [ Your one stop source for vacuum cleaners, sweepers, bags, and belts ]
GoHepa Vacuum Cleaners - Supplier of industrial HEPA filters, commercial HEPA vacuum cleaners, and HEPA vacuum replacement parts.
Meta Description: [ GoHepa.com is an online global supplier of industrial HEPA filters, industrial or commercial HEPA vacuum cleaners, and HEPA vacuum replacement parts. ]
GottaHaveBags.com - Discount vacuum bags, vacuum cleaners, parts, belts and filters, sewing machines and aerosol dispensers.
Meta Description: [ GottaHaveBags.com specializes in Eureka Bags,Hoover Bags,Kirby Bags,Miele Bags,Riccar Bags,Simplicity Bags,Dirt Devil Bags,Nutone Bags,Oreck Bags,Panasonic Bags,Pro Team Bags,Royal Bags,Compact Bags,Fairfax Bags,Filter Queen Filters,Sharp Bags,Silver King Disc Filter,Tri Star Bags,Windsor Bags,Ad... ]
Grey Technology - UK manufacturer of cordless electronic sweeper.
Meta Description: [ home ]
Griggs Vacuums - Discount sales of vacuum cleaners, steamers, sewing machines, parts and accessories.
Meta Description: [ vacuum, vacuum cleaner, vacuum cleaner
parts, upright vacuum cleaners, canister vacuum cleaners, eureka vacuum,
central vacuum, sanitaire,lindhaus, miele, dyson, hepa vacuum, carpet pro, fuller brush ]
Grimes Vacuum - Features Hoover products.
Hazlet Sewing and Vacuum - Miele authorized internet dealer, Sharp, Panasonic, Fantom, Royal and Hoover. Hypo-allergenic HEPA filter models and all brands of vacuum cleaner bags.
Meta Description: [ Industrial and Household Sewing machines and sergers, household and commercial vacuum cleaners, sewing machine parts and attachments, vacuum cleaner parts and accessories and premium appliances ]
Heparrest Filters - Offers HEPA vacuum filters for use in brands including Fantom, Sears, and Dirt Devil.
Meta Description: [ Fantom hepa filter, Miele, Miele HEPA filter, Miele Vacuum, Miele Vacuum filter, Fantom Cyclone XT HEPA filter, Fantom cyclone, Fantom Twister 300SE, Fantom Twister filter, Fantom Twister HEPA Filter, Fantom Lightning HEPA filter, Fantom Cyclone, HEPA vacuum cleaner filters for use in Eureka vacu... ]
Long Beach Vacuum - Offers various vacuum brands.
Meta Description: [ Vacuum cleaners for the home or commercial vacuum cleaners for work. Lowest vacuum prices guaranteed. ]
Miracle Mate USA, Inc. - Info on the Miracle Mate system.
Meta Description: [ Miracle Mate USA, Inc. Platinum Vacuum Cleaner System; performance, service, and warranty information; supplies ordering. ]
Mobile Vacuum - Canadian vacuum dealer offers various brands
Mr. Vacuum and Mrs. Sew - New and used sewing machines, new vacuum cleaners and accessories. Ships in continental USA.
Meta Description: [ Sewing Machines Vacuum Cleaners At Mr. Vac and Mrs. Sew we are proud to offer you a wide variety of sewing machines, vacuum cleaners, embroidery machines and other related items. ]
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PHC Dyson Online - Offers a range of vacuum cleaners and accessories.
Meta Description: [ Dyson parts and dyson spares are offered from our online Dyson superstore. We offer technical help and advice for your dyson hoover or dyson vacuum. ]
Processing Equipment, Inc. - Offers industrial vacuums.
Meta Description: [ Industrial Central Vacuum Systems, portable, mist collectors ,including Dust Collection. ]
Ristenbatt - Articles on performance, design and construction aspects including detailed descriptions of machines we recommend and sell.
Meta Description: [ Ristenbatt Vacuum's Secure Online Store - Your best source for vacuums, vacuum cleaner accessories, bags, filters and belts. Brands include Miele, Lindhaus, SEBO, Sanitaire, Panasonic, Eureka, Hoover and Hayden. ]
Shop-Vac - Official site for the Shop-Vac.
State Vacuum of Tampa - Authorized vacuum cleaner dealer for Miele and Hoover. A complete line of HEPA filters, vacuum cleaner bags and accessories.
Meta Description: [ vacuum cleaner, Miele Authorized dealer, Hoover, Eureka, Sanitaire, Sharp, Royal, Panasonic, Oreck, Windsor, Samsung, Sanyo, ShopVac and Riccar. A complete line of vacuum cleaner bags, carpet cleaners, steam cleaners, floor scrubbers, HEPA filters, and vacuum cleaner accessories. ]
SVC Vacuum Co. - Sells new vacuum cleaners, bags, belts, parts, filters, and accessories.
Meta Description: [ Online supply of the best vacuum cleaner products. Cheap prices of vacuum bags, vacuum belts, vacuum filters, vacuum parts, steamer parts and shampoo. ]
Texas Sew Wares, Inc. - Offers Hoover canisters, uprights, self-propelled, and bagless machines.
Meta Description: [ Sewing Machines, Serger Machines, Embroidery Machines, Vacuum Cleaners and more all at discount prices! Brand names like Craft Master Sewing Machines New Home sewing Machines Janome Sewing Machines Singer Sewing Machines Brother Sewing Machines White Sewing Machines Simplicity Sewing Machines -... ]
The Kirby Company - Manufacturer of home cleaning systems.
Meta Description: [ Kirby: quality, reliable HEPA vacuum cleaners are built to last. Find out about our Sentria model and how to order bags, parts and supplies for your Kirby vacuum. ]
The Vac Shop, Inc. - Supplies and parts for household and commercial cleaning services.
Meta Description: [ Vacuum Cleaners Retail Wholesale Supplies Parts for Household Commercial cleaning services industrial Sanitaire Eureka Sharp Lindhaus Euroclean Built-in Central Backpacks Wet Dry HEPA discount prices, affordable ]
The Vacuum Bag Shop - Offer a number of different models of vacuum cleaner bags. Located in the UK, shipping worldwide.
Meta Description: [ Buy Vacuum Cleaner Bags online here at low prices. All types of vacuum bags available from stock. Buy online now. Vacuum Cleaner Bags available from stock for immediate despatch. Buy online now. ]
The Vacuum Center - Vacuum cleaners, Floor buffers, central vacuum cleaner systems, and vacuum bags. Also provides a vacuum cleaner buying guide.
Meta Description: [ TheVacuumCenter.com The Vacuum Center - your source for vacuum cleaners, vacuum cleaner bags, vacuum parts, vacuum belts, and other floor care products. ]
The Vacuum Spot - Offers vacuums from various manufacturers.
Meta Description: [ >metadescription< ]
TotalVac.Com - Offers bags, belts, filters, and parts online.
Meta Description: [ vacuum cleaner bag, vacuum cleaner belt, vacuum bags, shaver parts, Cuisinart parts, Braun parts and more parts at TotalVac.com ]
Vac-Qum - UK distributor of vacuum products.
Vacmans - Canadian vacuum cleaner dealer offering sales and service on various brands
Vacuum and Sewing Center, Inc - Vacuum cleaners, floor shampooers, detergents, and air purifiers. Also offers sewing machines, irons, and other laundry items.
Meta Description: [ Authorized dealer of Miele vacuum cleaners and Miele Appliances. Shop online for SEBO, Bosch, Saeco, Singer products, and also a wide selection of HEPA air purifier and air filter products and kitchen utensils. ]
Vacuum Cleaner Bags - Stocks products for most major brands.
Meta Description: [ We have has the vacuum bag you need for Hoover, Eureka, Kirby, Oreck, Bissell, Dirt Devil , Regina, Riccar, Royal and Simplicity vacuums. ]
Vacuum Cleaner Center - Offers vacuum cleaners, attachments, HEPA filters, and bags.
Meta Description: [ Vacuum Cleaner Center is your authorized Miele vacuum cleaner dealer for Miele vacuum cleaners, Sebo vacuums, Hoover vacuums, Eureka vacuums and other name brand vacuum cleaners. Contact us today for Miele HEPA vacuum filters, bags and other accessories! ]
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Vacuum Cleaners 4 U - UK (United Kingdom) distributor of vacuum cleaners.
Vacuum Depot - Offering Hoover, Eureka, Dirt Devil, and other brands of vacuums and parts online.
Meta Description: [ Vacuum Parts and Vacuum Cleaner by Hoover, Dirt Devil, Eureka, Panasonic, Royal, Sharp and Sanitaire at Vacuum - Depot.com. Having built a reputation on good will and experience, owner Kevin Booth has always been able to help each customer with a wide variety of products and services to meet all ... ]
Vacuum Outlet - Vacuum cleaners, bags, belts, and parts along with new and used name brand vacuums.
Meta Description: [ Vacuum Outlet - Secure Online Ordering. Your internet specialist for Miele vacuums, bags and parts for Rainbow, Kirby, Sharp and other vacuums. ]
Vacuum Solutions - Vacuum cleaners, commercial vacuums, central vacuums, bags and parts.
Meta Description: [ WHOLESALE VACUUM CLEANERS- CENTRAL VACUUMS- COMMERCIAL VACUUMS- BAGS BELTS ANT PARTS AT WHOLESALE .LOWEST PRICES ON THE NET. ]
Vacuumstore - Central and standard vacuum store with a wide range of products and name brands.
Vaczone - Offers canisters, uprights, accessories, filters and bags.
Meta Description: [ Miele vacuums and vacuum cleaners (canisters and uprights) as well as accessories, attachments, H.E.P.A. (HEPA) filters and bags. ]
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Virginia Vacuums - Offers products for a variety of brands.
Willett Vacuum - Specializing in HEPA-equipped vacuum cleaners and accessories.
Meta Description: [ A Miele Authorized Dealer featuring HEPA-equipped vacuum cleaners, bags, belts, brooms, mops and accessories. Visit our Richmond, Virginia location. ]
Mobile Vacuum - Canadian vacuum dealer offers various brands
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