英文關鍵字
steel
heat
fire
red
industry
foundry
temperature
industrial
danger
manufacturing
smelting
metal
glowing
furnace
metallurgy
molten
factory
hot
metallurgical
iron
work
plant
production
flame
casting
liquid
equipment
smoke
bright
spark
power
melting
worker
heavy
mill
steelworks
technology
smelter
pouring
manufacture
melt
workshop
glow
man
cast