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UPVC WINDOWS MIDDLESBROUGH

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Middlesbrough (pronunciation (help·info); IPA ['mɪdəlzbɹə] (received pronunciation)) is a town in the Tees Valley sub-region of the North East of England. It is the largest and most populous settlement within the borough of Middlesbrough, which encompasses the town and several outlying villages which have become suburbs. Historically part of the North Riding of Yorkshire, in 1968 the town became the centre of the county borough of Teesside, which was absorbed by the non-metropolitan county of Cleveland in 1974. In 1996 Cleveland was abolished, and the Middlesbrough borough became a unitary authority, within the ceremonial county of North Yorkshire. Middlesbrough is different from the other districts on Teesside, as the borough is almost entirely urbanised, thus making it the largest town in terms of area and population, but the smallest district. However, the areas of Eston, Grangetown, Normanby, Ormesby, and South Bank in the neighbouring borough of Redcar and Cleveland, are also part of the Middlesbrough agglomeration. Middlesbrough is situated on the south bank of the River Tees, a few miles from the edge of the North York Moors National Park. Teesport[2], the UK's second largest port, lies 3 miles (4.8 km) to the east, and Durham Tees Valley Airport[3] lies 8 miles (13 km) to the west, near Darlington. North east of Middlesbrough, the Tees Estuary with its colony of breeding seals has extensive sandy beaches in both directions. Some 7000 salmon and 13,000 sea trout migrated upstream through the estuary in 2000.

History Polyvinyl chloride was accidentally discovered on at least two different occasions in the 19th century, first in 1835 by Henri Victor Regnault and in 1872 by Eugen Baumann. On both occasions, the polymer appeared as a white solid inside flasks of vinyl chloride that had been left exposed to sunlight. In the early 20th century, the Russian chemist Ivan Ostromislensky and Fritz Klatte of the German chemical company Griesheim-Elektron both attempted to use PVC (polyvinyl chloride) in commercial products, but difficulties in processing the rigid, sometimes brittle polymer blocked their efforts. In 1926, Waldo Semon and the B.F. Goodrich Company developed a method to plasticize PVC by blending it with various additives. The result was a more flexible and more easily-processed material that soon achieved widespread commercial use.

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