機器
blue
chemical
condensation
construction
copy
copyspace
distillery
dusk
factory
fog
fuel
fumes
funnel
gas
heavy
industrial
industry
landmark
landscape
lights
manufacturing
pipe
pollution
power
production
refinery
rust
rusty
sky
skyline
smog
smoke
space
station
steam
substance
supply
tanks
technology
tower
toxic
tube
twilight
urban
vapor
waste
white
works