Stock Photo: An oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (left side), walking beam, crank, and counterweight. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.

4316-3308 Rights Managed
Category: Science
  • Model Release: No
  • Property Release: No

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  • 17.9" x 11.93"
  • 300 dpi
  • 54.97MB
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