機器
activity
backhoe
barrier
black white
bucket
bulldozer
civil
clay
construction
crew
dig
digger
digging
dirt
ditch
earth mover
engineering
equipment
excavate
excavating
excavation
excavator
fence
fenced
ground
industry
land
machinery
mud
power
process
progress
project
protection
row
scoop
site
soil
street
terrain
trench
trenching
truck
under
urban
utility
vehicle
wire
work