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Crude oil was discovered here in late 19th century and first oil well was dug in 1866. Digboi is known as the Oil City of Assam where the first oil well in Asia was drilled. Digboi has the oldest oil well in operation. ...
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1.Mineral oils are produced from refined hydrocarbons obtained from crude oil by distillation. They are applied as hydrodynamic lubricants and as carriers of additives promoting boundary or solid-film lubrication
2. Petroleum
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