英文關鍵字
australia
blast
blue
building
chimney
coal
coke
construction
ecology
energy
environment
equipment
exterior
factory
furnace
gold
heavy
high
industrial
industry
iron
ironmaking
ironstone
machinery
manufacturing
material
metal
metallurgical
metallurgy
mine
mineral
ore
oven
plant
pollution
power
precious
process
puddling
refine
scenery
sky
smelt
steel
steelworks
tanks
technology
tower
work
workshop