機器
amazing
barrel
beautiful
black
business
cloudy
colorful
concepts
counterweight
crude
dawn
derrick
diesel
drill
drilling
ecology
energy
equipment
exploration
extraction
field
fuel
gas
gasoline
industrial
industry
jack
lever
metal
mining
nobody
oil
petroleum
pipe
pipeline
pollution
power
production
pump
resource
rig
scenery
sky
sun
sunrise
sunset
supply
technology
well