機器
barrel
barrels
cloud
color
construction
crude
dark
day
depletion
derrick
diesel
drill
drilling
energy
environment
equipment
exhaustion
exploration
field
fossil
fuel
gas
gasoline
image
industrial
jack
natural
nature
nobody
nonrenewable
oil
oilfield
oilwell
petroleum
pipe
pollution
power
pump
pumping
pumpjack
refinery
resource
rig
rural
sky
supply
technology
tower
vertical