英文關鍵字
azerbaijan
baku
barrels
business
close
conservative
counterweight
crude
derrick
diesel
donkey
drill
drilling
energy
equipment
exploration
explore
extract
extraction
field
fossil
fuel
gasoline
geology
industry
jack
machinery
money
natural
nature
nobody
nodding
oil
oilwell
old
onshore
petrol
petroleum
pipeline
production
pump
pumpjack
reserves
supply
technology
texas
tower
usa
well