機器
above
activity
background
base
block
bulldozer
business
commercial
concrete
contractor
development
dig
dirt
earth
engineering
environment
equipment
excavate
excavation
excavator
grading
ground
heavy
industrial
industry
job
labor
landscape
machinery
material
metal
mineral
outdoor
planning
powerful
prepare
production
project
quarry
sand
soil
top
top view
vehicle
view
work
working