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A chemical engineer controls the quality of the extracted oil. a man in a white protective helmet holds a test tube with crude oil against the background of an oil rocking chair
Keywords:
engineer
fossil fuel
men
mining
machinery
fuel and power generation
working
oil
oil field
construction industry
exploration
caucasian ethnicity
outdoors
natural gas
work helmet
industry
nature
equipment
oil pump
hardhat
oil well
occupation
gasoline
oil industry
one person
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