art
assembly
auto
automation
background
black
building
business
car
clip art
company
connect
construction
design
electricity
energy
engineering
environment
equipment
factory
graphic
hazardous
icon
icon set
illustration
industrial
industrial building
industry
isolated
machinery
manufacture
manufacturing
nuclear plant
nuclear power plant
oil refinery
pictogram
plant
power
power plant
power station
production
refinery
set
sign
smoke
symbol
technology
white background
work