機器
blue
bright
business
chemical
chemistry
construction
danger
distillery
electrical
electricity
energy
engineering
environment
environmental
equipment
factory
fire
flame
fuel
gas
gasoline
global
industrial
industry
light
metal
nature
oil
petrochemical
petrol
petroleum
pipeline
plant
pollution
power
production
refinery
sky
smoke
station
steam
sunset
supply
technology
tower
tube
water