機器
architecture
background
blue
build
buildings
business
cement
city
concrete
condominium
construct
construction
contractor
crane
create
derrick
develop
engineering
equipment
erect
estate
flats
foundation
growth
heavy
homes
infrastructure
iron
labor
lattice
lifting
make
material
metal
offices
operator
properties
rise
site
sky
skyscraper
steel
strength
structure
supplies
tower
unfinished
urban
work