機器
activity
architecture
big
blue
build
building
bulldozer
business
city
concrete
construction
crane
development
dig
dirt
earth
engineering
equipment
excavation
excavator
ground
heavy
high
hydraulic
industrial
industry
large
loader
machinery
metal
mover
new
outdoors
power
sand
scoop
shovel
site
sky
steel
structure
technology
tower
tractor
urban
vehicle
work
working
yellow