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The 2010 Audi R8 lineup gains a fresh, better model. This 2-seat exotic car has Audi's quattro all-wheel drive and a mid-mounted engine. The entry-level 4.2 features a 420-horsepower 4.2-liter V8 engine. New for 2010 will be the 5.2, which includes a 525-horsepower 5.2-liter V10. Both models are available which has a 6-speed manual transmission or Audi's R tronic 6-speed automated manual. Available safety measures include ABS, traction control, antiskid system, side airbags, and knee airbags. Standard features on all R8 models include leather upholstery, heated seats, and wireless cell-phone link.
The rapid development of air filters is closely related to the development of military industry and electronic industry. In the first world war, the use of various chemical agents, asbestos fibre filter paper as the smoke filter layer of military gas masks came into being. The glass fiber filter medium is used in air filtration to obtain a patent in the United States in October 1940. In the 1950s, the United States studied the production process of glass fiber filter paper, and the air filter was improved and developed. In the 1960s, HEPA filters came out; In the 1970s, the filter paper of fine glass fiber was used as the HEPA filter of filter medium, and the filtration efficiency of particle size of 013 micron particle diameter was 99.9998%. Since the eighty s, with the emergence of new test method, use evaluation to improve and to improve the filtering performance requirements, found the HEPA filter there is a serious problem, and he had a higher ULPA filter performance. Countries are still working on it and expect more advanced air filters soon
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