機器
barrel
black
business
conventional
counterweight
derrick
desert
diesel
drill
energy
equipment
exhaustion
exploration
field
fuel
gas
gasoline
generation
global
illustration
industry
lake
man
natural
ocean
oil
oilfield
people
pipe
pipeline
pollution
power
prosperity
pump
rig
rural
sea
silhouette
sky
sunset
technology
warming
water
wealth
well
worker