機器
activity
arm
backhoe
bucket
build
bulldozer
burrow
construction
construction site
development
dig
digger
digging
dirt
equipment
excavate
excavating
excavation
excavator
gravel
ground
hole
hydraulic
improvement
industrial
industry
loader
machinery
mover
open
outdoors
pit
sandpit
scoop
shovel
site
soil
tractor
trench
vehicle
workers
working
works