英文關鍵字
agricultural
agriculture
ammonia
background
building
chemical
chemistry
chimney
construction
design
diesel
distillery
ecology
economy
energy
engineering
environment
factory
fuel
gas
grain
industrial
industry
landscape
lights
manufacture
metal
night
oil
petrochemical
petroleum
pipe
plant
pollution
power
processing
protection
refinery
silo
smoke
smokestack
stack
steam
sunset
supply
technology
tower
tube