機器
alberta
business
chemical
chemistry
crisis
crude
dawn
derrick
diesel
donkey
drill
drilling
economic
economy
energy
exploration
explore
factory
field
fingers
fossil
fuel
gas
gasoline
industrial
industry
job
ladies
mechanical
metal
oil
petroleum
pipeline
platform
power
production
rig
silhouette
sky
steam
storage
structure
sunset
technology
tube
unit
warming
well
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