機器
architecture
beautification
chair
crude
derrick
drill
drilling
electric
environment
equipment
exploration
extraction
facility
field
framework
fuel
gas
gasoline
generation
heavy
industry
landscape
machinery
natural
nature
oil
outline
petrochemical
physics
pipe
pipeline
platform
pollution
power
pressure
pump
rural
scene
sky
steel
sun
sunsets
supply
swing
the
tools
wealth
work