機器
ammonia
background
blue
business
chemical
chemistry
chimney
construction
crane
day
energy
engineer
engineering
environment
equipment
factory
fuel
gas
gasoline
gray
heavy
industrial
industry
manufacturing
metal
methanol
nobody
oil
petrochemical
petroleum
pipe
pipeline
plant
pollution
power
production
refinery
resources
shine
sky
stainless
steam
steel
storage
structure
tank
technology
tube
workshop
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