英文關鍵字
abstract
background
bright
burn
closeup
concept
danger
design
energy
equipment
extreme
factory
fire
flame
glow
heating
hot
idea
incandescent
industry
insulation
iron
light
manufacture
material
melting
metal
metallurgy
observe
orange
plant
process
processes
rotating
round
smelting
spreading
steel
window
works
yellow