beam
building
caofeidian
chemical
color
crank
crude oil
development
drilling rigs
dusk
energy
environment
equipment
evening
exploration
extraction
facilities
framework
fuel
geology
hebei
industrial
jidong oilfield
machinery
mineral
mining
natural gas
oil
oil pump
petrochemical
platforms
production
pumping unit
rotation
silhouette
sky
sunset
swing
technology
tools
定額
CAOFEIDIAN - DECEMBER 1: The crank balanced beam pumping unit under the curtain of night in the JiDong oilfield, on December 1, 2013, caofeidian, hebei province, China.の素材 [FY31028770819]
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