機器
activity
background
big
buldozer
bulldozer
construct
construction
contruct
diesel
dig
digger
doze
dozer
dragging
driving
earth
earthmover
eathmoving
engineering
equipment
excavation
excavator
grader
ground
heavy
hydraulic
industrial
industry
iron
landscaping
large
loader
machinery
mine
mining
operate
operator
rig
scraper
site
tractor
transport
truck
vehicle
work
worker
working
yellow