機器
architecture
blue
building
business
chemical
chemistry
chimney
construction
electric
electrical
electricity
emission
energy
engineer
engineering
environment
equipment
facility
factory
fuel
gas
generator
heavy
industrial
industry
infrastructure
light
manufacturing
metal
oil
petrochemical
pipe
pipeline
plant
pollution
power
power plant
production
refinery
sky
smoke
station
steam
steel
structure
technology
tower
twilight
worker