機器
barrel
black
business
collapse
concept
construction
contamination
cracks
dead
derrick
desert
drilling
dry
end
energy
environment
environmental
equipment
exploration
extraction
field
fossil
fuel
gas
gasoline
generation
grass
industrial
industry
infertile
jack
natural
oil
outdoors
petroleum
pipe
pipeline
pollution
power
production
pump
resources
rig
silhouette
sky
soil
technology
well
wilderness