英文關鍵字
bright
casting
ecology
electricity
electrode
environmental
factory
fire
flame
forging
foundry
furnace
glow
glowing
heat
heavy
hot
industrial
industry
iron
ironworks
junkyard
liquid
material
melting
metal
metallic
metallurgical
metallurgy
molding
molten
orange
plant
pollution
pouring
recycled
recycling
red
rusty
scrap
shiny
smelting
smoke
steel
technology
wallpaper
waste
working
yard