英文關鍵字
1080p
1920x1080
activity
apartment
architecture
build
builder
building
cement
city
closeup
clouds
concrete
construct
constructing
construction
contractor
crane
elevator
engineer
equipment
erect
estate
hoist
hoisting
house
industrial
industry
infrastructure
iron
jib
machine
machinery
mechanism
metal
motion
orange
people
picking
project
rail
scaffold
site
sky
steel
structure