英文關鍵字
backdrop
bright
burn
burner
business
casting
closeup
color
conveyor
equipment
factory
fire
foundry
fuel
furnace
generator
heat
heavy
hot
industrial
industry
iron
light
liquid
manufacturing
melting
metal
metallurgy
mill
molten
orange
plant
pollute
pollution
power
process
production
red
refine
resource
rod
roller
rolling
spark
steel
stove
technical
temperature
tube
welding