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UPVC WINDOWS PETERBOROUGH

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Peterborough (pronounced /ˈpiːtəˌbərə/ listen (help·info)) is a cathedral city and unitary authority area in the East of England, with a projected population of 161,800 as of 2007.[5] For ceremonial purposes it is in the county of Cambridgeshire. The Town Hall is 75 miles (121 km) north of London at Charing Cross. The city is situated on the River Nene, which flows into the North Sea approximately 30 miles (48 km) to the north-east. The local topography is notoriously flat and low-lying, and in some places lies below sea level. The area known as the Fens falls to the east of Peterborough. The City of Peterborough includes the outlying settlement at RAF Wittering, and as a unitary authority borders Northamptonshire and Rutland to the west, Lincolnshire to the north, and Cambridgeshire to the south and east. Human settlement in the area dates back to before the Bronze Age, as can be seen at the Flag Fen archaeological site to the east of the current city centre. This site also shows evidence of Roman occupation. The Anglo-Saxon period saw the establishment of a monastery, then known as Medeshamstede, which later became Peterborough Cathedral. The population grew rapidly following the arrival of the railways in the nineteenth century, and Peterborough became an industrial centre, particularly noted for its brick manufacture. Following the Second World War, growth was limited until designation as a New Town in the 1960s. The population is once again undergoing rapid expansion and a £1 billion regeneration of the city centre and immediately surrounding area is underway.

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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