英文關鍵字
antique
art
background
blast
business
casting
construction
design
energy
environment
equipment
factory
filament
foundry
furnace
glass
gold
heat
hot
illustration
incandescent
industry
iron
isolated
lamp
lightbulb
line
machinery
manufacture
metal
metallurgical
metallurgy
molten
nature
object
old
pattern
plant
process
production
rolling
rose
shine
shop
smoke
steel
technology
top
vector
view
white
work
worker
workshop