金属産業
burner stove top
burning
business
colors
competition heat
conveyor belt
environment
exploding
factory
fire natural phenomenon
flame
fossil fuel
foundry
fuel and power generation
furnace
generator
hair curlers
heat temperature
heavy
industrial equipment
industry
iron metal
liquid
manufacturing
manufacturing equipment
melting
metal
metal ore
metallurgy
mill
mining
molding a shape
molten
no people
open hearth furnace
orange color
pollution
red
rolling
smoke physical structure
spark singer
sparks
steel
steel mill
stove
technology
temperature
welding