英文關鍵字
bright
bronze
craft
crucible
cup
dark
engineering
equipment
factory
ferrous
fill
fire
flame
flow
flowing
foundry
furnace
glow
gold
heat
heavy
hot
illumination
industrial
industry
iron
ladle
liquid
manufacturing
material
melt
metal
metallic
mill
molten
object
orange
plant
pour
red
smelt
smelting
spark
steel
technology
tool
work
workshop
yellow