機器
activity
backhoe
blade
blast
building
bulldozer
construction
development
dig
digger
dirt
drill
drilling
earth
engineering
equipment
excavate
excavating
excavation
excavator
ground
heavy
highway
hole
hydraulic
hydraulics
industrial
industry
land
machinery
mine
mover
mud
power
puddle
rig
road
rock
sand
shovel
site
soil
spain
stone
track
vehicle
work