'(<a href="http://www.j-archive.com/media/2004-02-02_J_28.jpg" target="_blank">Cheryl of the Clue Crew stands in front of an oil pumpjack in Oklahoma City.</a>)  The pumpjack has to pump 42 gallons of oil out of the ground to equal one of these units'
a barrel
EQUIVALENTS: The pumpjack has to pump 42 gallons of oil out of the ground to equal one of these units
The pumpjack has to pump 42 gallons of oil out of the ground to equal one of these units
The pumpjack has to pump 42 gallons of oil out of the ground to equal one of these units
EQUIVALENTS
a barrel
EQUIVALENTS