英文關鍵字
air
atmosphere
blue
building
carbon
chemical
chimney
climate
construction
dioxide
energy
engineering
enterprise
environment
environmental
equipment
factory
foundry
fuel
fume
furnace
gas
general
global
heat
heavy
hot
housing
industrial
industry
iron
machinery
magnitogorsk
manufacture
manufacturing
metal
mill
pipe
pollution
power
production
red
safety
sky
smog
smoke
smokestack
spark
steel
technology
tower
toxic
view
warming
work
works