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英文關鍵字
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bright
equipment
metal
liquid
plant
orange
action
light
steel
industrial
power
technology
pouring
heavy
flowing
smoke
construction
industry
hot
pour
working
occupation
work
fire
flame
glow
glowing
heat
production
manufacturing
iron
burning
mill
workshop
worker
factory
sparks
cast
effort
fumes
furnace
melting
molten
foundry
metallurgy
metallurgical
smelting
Heavy Industry
steel mill