機器
activity
angle
backfill
backhoe
boom
bucket
build
bulldozer
coal
construction
dig
digger
dipper
dirt
dozer
earth
engineering
equipment
excavate
excavating
excavation
excavator
fluid
front
ground
heavy
hydraulic
industrial
industry
land
loader
machinery
mine
motor
mover
quarry
sand
scoop
shovel
site
soil
stick
track
tractor
undercarriage
vehicle
wheel
work
yellow