機器
environmental
autumn
barrel
black
business
crude
drilling
earth
ecology
energy
environment
equipment
exploration
extract
field
fossil
fossil fuel
fuel
gas
gasoline
generation
industrial
industry
jack
landscape
natural
nature
nodding
oil
oil well
oilfield
oilwell
one
petroleum
pipe
pipeline
platform
power
pump
pumpjack
resource
rig
rural
supply
technology
tower
unit
well
yellow