機器
blue
business
chemical
chink
construction
crude
danger
dark
drilling
ecology
economy
energy
environment
equipment
exploration
extraction
facility
field
fossil
fuel
gas
gasoline
income
industrial
mineral
natural
nobody
nodding
oil
one
outdoor
petroleum
pipeline
platform
pollution
power
profit
pump
pumpjack
resource
rig
rocking
silhouette
sky
sunset
technology
tool
well
work