機器
activity
background
backhoe
bucket
bulldozer
construction
development
dig
digger
dirt
earth
engineering
equipment
excavate
excavation
excavator
gravel
ground
heavy
horizontal
hydraulic
industrial
industry
large
loader
machinery
mining
mount
mountain
mover
mud
outdoor
pile
power
real estate
reservoir
road
sand
scoop
shovel
site
sky
soil
swamp
terrain
tract
tractor
transportation
vehicle
work
yellow