機器
business
chemical
chemistry
chimney
construction
dark
distillation
drill
dusk
energy
engineering
environment
equipment
factory
fuel
gas
global
heavy
industrial
industry
light
manufacturing
metal
night
offshore
oil
petrochemical
petrol
petroleum
pipe
plant
platform
pollution
power
production
refine
refinery
rig
sky
smoke
steam
steel
structure
sunrise
sunset
technology
tower
tube
worker