英文關鍵字
automobile
boil
boiler
capacity
chemical
chemistry
chimney
energy
engineer
engineering
factory
fuel
gas
gasoline
heavy
industrial
industry
landscape
lapse
light
liquid
manufacturing
metal
night
oil
petrochemical
petroleum
pipe
pipeline
plant
pollutant
pollute
pollution
power
production
refine
refinement
refinery
reflection
river
sky
smoke
sphere
steam
storage
tank
time
tower
worker