Crude oil is removed from the earth through drilling. It is then separated into its different components by heating and boiling. After this step, gasoline is processed and delivered to central terminals via barges.
Crude oil is removed from the earth through
. It is then
into its different components by heating and boiling. After this step, gasoline
is processed and delivered to central terminals via
:: mining :: underground pipes
drilling
:: barges :: separated :: extracted
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