機器
activity
arm
backhoe
blade
blue
bucket
building
bulldozer
caterpillar
clear
construction
crawler
daytime
dig
digger
digging
dirt
earth
earthmover
earthmoving
equipment
excavate
excavation
excavator
falling
gravel
heavy
hole
hopper
hydraulic
industrial
industry
land
landscape
loader
loading
machinery
mechanical
mine
mining
mover
moving
no people
nobody
object
outdoors
piston
power
quarry
sand
scoop
scooping
shovel
single
site
sky
soil
tip
tractor
trench
truck
vehicle
work
working