機器
activity
asphalt
auto mixer
axle
background
backhoe
bucket
building
bulldozer
concrete
construction
crushed stone
dig
digger
digging
engineering
equipment
excavate
excavating
excavation
excavator
field
grass
green
ground
heavy
highway
hydraulic
industrial
industry
landscape
loader
machinery
min buri
motor
mountains
operate
pressure
public
repair
road
sand
shovel
soil
tractor
truck
truck crane
vehicle
work