機器
activity
architecture
asphalt
axle
background
building
bulldozer
compactor
concrete
construction
development
dig
digger
digging
equipment
excavation
excavator
field
forest
grass
gravel
green
ground
heavy
industrial
industry
landscape
loader
machinery
maintenance
min buri
mound
mountains
operate
outdoor
paver
public
repair
road
roadblock
roller
sand
shovel
soil
tractor
truck
vehicle
wheel
work