機器
brown
building
business
chemical
chemistry
chimney
complex
distillery
energy
engineering
environment
factory
fuel
gas
global
heavy
high
industrial
industry
manufacture
metal
night
oil
petrochemical
petrol
petroleum
pipe
pipeline
pipes
plant
pollution
power
production
refinery
resource
sky
smoke
station
steam
steel
structure
sunset
technology
tower
tube
twilight
warming