英文關鍵字
are
belt
blacksmith
blanks
box
bright
casting
conveyor
energy
factory
fall
fire
fit
flame
flattening
fluid
forged
forging
foundry
furnace
glow
hammer
heat
heavy
hot
industry
iron
light
liquid
melting
metal
metallurgy
molten
move
moved
night
open
orange
oven
production
profession
red
shop
size
smoke
steel
stove
technology
work
worker
workpieces
yellow