英文關鍵字
alloy
background
bright
burning
cast
casting
chimney
color
energy
engineering
equipment
factory
fire
flame
foil
foundry
furnace
furnaces
graphite
heat
heavy
hot
industrial
industry
iron
light
liquid
machine
manufacturing
melting
metal
metallurgical
metallurgy
mold
molten
plant
pour
production
red
safety
smelting
steel
technology
tradition
turkey
uss
work
worker
workers
yellow