英文關鍵字
action
aluminum
blast
burning
cast
color
danger
engineering
environment
equipment
factory
ferrous
forge
foundry
furnace
heat
hot
industry
iron
kiln
liquid
manufacturing
melting
metal
metallurgical
metallurgy
mill
molten
occupation
plant
pour
production
red
remelting
smelting
steel
steelworks
work
workshop