機器
alberta
back
barrels
big
black
blue
conventional
counterweight
crude
depletion
derrick
diesel
energy
equipment
exhaustion
exploration
facility
finances
fossil
fuel
gas
gasoline
generation
geology
global
industrial
industry
jack
land
lever
money
natural
nonrenewable
oil
oilfield
oilsands
oilwell
oklahoma
petroleum
pipe
pipeline
pollution
power
production
prosperity
pump
pumpjack
reservoir
selenium
sky
steel
sun
supply
texas
warming
wealth
well