英文關鍵字
building
business
chemical
chemistry
clouds
color
construction
contemporary
day
energy
environment
equipment
exterior
factory
fuel
gas
gasoline
industrial
industry
lighting
manufacturing
metal
natural
nobody
oil
pan
people
pipe
pipeline
plant
pollution
power
real
refinery
sky
smoke
station
steel
storage
structure
supply
tank
technology
tower
toxic
tube