機器
activity
backhoe
blue
bucket
build
building
bulldozer
construction
development
dig
digger
dirt
drainage
dredger
earth
engineering
equipment
excavate
excavating
excavation
excavator
foundation
ground
heavy
hydraulic
industrial
industry
loader
machinery
mine
mover
outdoor
pipes
power
quarry
road
sand
scoop
shovel
site
sky
soil
sun
technology
tractor
vehicle
work
yellow