bright
casting
china
close up
combustion
conveyor
danger
equipment
factory
fire
flame
foundry
fuel
glowing
heat
heavy
hot
indoor
industrial
industry
interior
iron
ironworks
line
manufacture
manufacturing
metal
metallic
metallurgical
metallurgy
mill
plant
pollute
power
process
production
red
roller
rolling
smelting
spark
steel
steelworks
stove
technical
technology
temperature
workshop
yellow