機器
bucket
building
bulldozer
clay
crawler
dig
digger
dirt
dredger
earth mover
earthmover
earthmoving
earthwork
environment
equipment
excavate
excavation
excavator
grab
gravel
green
ground
heavy
hydraulic
industrial
lake
light
loader
machinery
mine
mover
mud
nature
pond
ponddigging
quarry
rocks
scoop
shovel
silt
site
sludge
small
soil
vehicle
water
work
working