black
building
bulb
business
coal
computer
construction
dam
electricity
energy
engine
engineer
engineering
factory
fuel
gear
icon
icons
industrial
industry
light
logistic
mill
mine
mineral
nuclear
oil
petrol
pipe
pipeline
plant
pollution
power
red
refinery
set
sign
smoke
solar
station
symbol
transport
transportation
truck
tube
vector
web
wind
worker