機器
barrel
borehole
business
construction
drilling
ecology
economy
energy
engineering
environment
equipment
exploration
extraction
field
forest
fuel
gasoline
industrial
industry
landscape
metal
mining
nature
oil
oilfield
old
petrochemical
petroleum
pipe
pipeline
platform
pollution
power
pump
resource
rig
rural
russia
rusty
siberia
simple
spring
steel
technology
vintage
water
well
work
yellow