blast
blastfurnace
building
chemical
chemistry
coal
construction
courtyard
department
dirty
ecological
ecology
environment
environmental
equipment
exterior
factory
foundry
framework
freight
furnace
heat
heavy
industrial
industry
iron
issue
loading
manufacturing
metal
metallurgical
metallurgy
plant
pollution
power
problem
production
protect
protection
railroad
railway
shop
station
steel
tower
track
unit
work
works
workshop