英文關鍵字
counterweight
derrick
energy
equipment
exhaustion
exploration
field
fuel
gas
gasoline
industrial
industry
lever
machine
oil
oilfield
outdoor
petroleum
pipeline
pollution
power
production
prosperity
pump
pumpjack
supply
英文關鍵字
counterweight
derrick
energy
equipment
exhaustion
exploration
field
fuel
gas
gasoline
industrial
industry
lever
machine
oil
oilfield
outdoor
petroleum
pipeline
pollution
power
production
prosperity
pump
pumpjack
supply