英文關鍵字
aerial
architecture
blue
building
chemical
chimney
city
color
construction
corporate
energy
environment
environmental
factory
fast
fuel
gas
gasoline
global
industrial
industry
kapotnya
landscape
manufacturing
metal
natural
oil
outdoors
pan
petroleum
pipes
plant
pollution
power
production
refinery
refining
sky
smoke
speed
spring
steam
steel
structure
technology
trees
warming
white
work
zone