機器
back
barrels
bashkortostan
conventional
counterweight
crude
depletion
derrick
diesel
energy
equipment
exhaustion
exploration
facility
finances
fuel
gas
gasoline
generation
geology
industrial
industry
jack
land
lever
natural
nonrenewable
oil
oilfield
oilsands
oilwell
petroleum
pipe
pipeline
pollution
power
production
prosperity
pump
pumpjack
reservoir
russia
sky
supply
wealth
well