機器
against
architecture
background
beams
block
blue
boom
building
business
city
clear
concept
construction
crane
cranes
equipment
estate
frame
green
high
home
hook
industrial
industry
investment
iron
jib
levee
lift
lifting
line
main
metal
mobile
poor
rigging
rope
safety
shape
site
sky
steel
structure
tall
technology
tower
urban
work
yellow