機器
activity
arm
backhoe
borrow
bucket
build
bulldozer
cast
construction
cut
development
dig
digger
dirt
earth
equipment
excavate
excavating
excavation
excavator
field
gravel
ground
heavy
hole
hollow
hydraulic
improvement
industry
loader
machinery
mine
mover
open
outdoors
pit
quarry
sand
sandpit
scoop
shovel
site
sky
soil
strip
tractor
vehicle
work
works