機器
action
activity
bucket
builder
building
bulldozer
city
construction
crane
development
dig
digger
digging
earth
equipment
excavation
excavator
ground
heavy
hole
hydraulic
industrial
industry
large
loader
machinery
male
man
megapolis
mover
people
repair
repairing
sand
scoop
shovel
sign
silhouette
site
sky
skyscrapper
skyscrappers
soil
tractor
truck
vehicle
work