blue
chemical
chemistry
chimney
city
clear
construction
diesel
distillation
distillery
energy
engineer
engineering
environment
factory
gas
industrial
industry
japan
japanese
kawasaki
lighting
line
manufacture
metal
night
oil
outdoor
outside
petrochemical
petrol
petroleum
pipe
pipeline
plant
pollution
power
production
protection
refinery
scene
sky
smoke
smokestack
station
supply
system
technology
tower
tube