英文關鍵字
background
block
build
building
buildings
business
businessman
businesswoman
city
cityscape
coal
collection
concept
construction
decorative
design
energy
engineer
engineering
estate
factory
female
high
house
icon
illustration
industrial
industry
isolated
isometric
landmark
makes
mechanics
mine
nuclear
object
open
palm
plant
pollution
power
real
refinery
researcher
road
surrounded
symbol
vector
view