architecture
bottom view
building
chimney
construct
construction
contaminate
detail
engineering
environment
equipment
factory
ferrous
founding
foundry
furnace
gas
heavy
industrial
industry
iron
machinery
manufacture
manufacturing
metal
metallurgical
metallurgy
mill
no people
old
outdoor
pipe
plant
polluting
power
production
red
rusty
sky
smoke
smokestack
stairs
steel
steelworks
structure
tall
technology
tower
urban
workshop