機器
barrel
blue
business
construction
crude
crude oil
derrick
diesel
drilling
ecology
energy
engineering
environment
equipment
exploration
extraction
field
fossil
fuel
gas
gasoline
generation
industry
jack
land
metal
mining
natural
natural gas
oil
oilfield
outdoor
petroleum
pipe
pipeline
platform
pollution
power
production
pump
refinery
resource
rig
sky
steel
supply
technology
tower
well