機器
agriculture
background
backhoe
canal
claw
clay
construction
country
deep
demolish
demolition
digger
digging
dirt
ditch
ditcher
double
drainage
earth
equipment
erect
excavation
excavator
field
flood
grab
ground
heap
heavy
industrial
irrigation
land
move
mover
old
olden
pile
pit
plow
power shovel
sand
soil
spreading
summer
technology
tractor
trench
trencher
wheel