英文關鍵字
acid
air
ammonia
business
chemical
chimney
cloudy
column
construction
container
danger
distillation
environment
equipment
factory
fertilizers
fuel
gas
gasoline
industrial
manufacturing
methanol
mist
nature
nitric
nitrogen
oil
petrochemical
petrol
pipes
plant
plumbing
poison
pollution
polypropylene
power
processing
production
refinery
sky
smoke
station
steam
tank
technology
timelapse
tower
toxic
wealth