英文關鍵字
casting
equipment
factory
fire
flame
foundry
furnace
glow
gold
heat
heavy
hot
industrial
industry
iron
ladle
liquid
manufacturing
melt
melted
metal
metallurgical
metallurgy
metalwork
mill
mold
molten
mould
moulding
plant
pouring
process
processing
production
shiny
spark
steel
temperature
tools
transportation
welder
welding
work