art
benzine
black
car
chemical
coin
collection
concept
crude
derrick
diesel
distribution
element
energy
extraction
factory
flammable
flat
fossil
fuel
gasoline
icon
illustration
industrial
industry
isolated
item
money
object
oil
petrol
petroleum
plant
power
processing
product
production
refinery
reserve
resource
set
sign
simple
source
station
substance
supply
symbol
technology