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Bitumen A black viscous mixture of hydrocarbons obtained naturally or as a residue from petroleum .

Heavy-duty diesel engine oil specifically designed to lubricate turbocharged and naturally aspirated diesel engines that .

Used as a chief ingredient in making fuel for jet aircraft, turboprop, and conventional ramjet .

The most common type of gas used around the world. It’s a by-product of crude .

Used to power the turbine and piston engines that keep jets and other aircraft in .

Substance which introduced to reduce friction between surfaces in mutual contact, which ultimately reduces the .