機器
activity
asphalt
blade
building
bulldozer
caterpilar
construction
development
digging
dirt
dirty
earth
engineering
equipment
excavation
excavator
grader
gravel
ground
heavy
hydraulic
industrial
industry
land
large
loader
machinery
mining
motor
mover
outdoors
power
road
rural
sand
scoop
shovel
site
soil
steel
track
tractor
transport
transportation
vehicle
wheel
work
worker
yellow