engineer controlling operation petroleum rig under blue sky |
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| navigate by keyword : man oil rig borehole drilling derrick pump rocking pipe mechanic engineer worker helmet operator pipeline petroleum regulating oilman watching looking checking providing gas construction well rod platform outdoors energy industry production extraction geologist controlling station working fuel field workwear uniform male sky overalls power operation servicing |
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| Oilman released excess pressure of gas into oil pipeline and watching as oil pump working. Worker ensuring safe extraction of oil. Oil drilling derrick at oilfield for petroleum production from ground |
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