機器
activity
align
bucket
build
builder
building
bulldozer
canal
clay
concrete
construction
contractor
crawler
development
digging
dirt
drainage
dredge
earth
earthmovingequipment
excavator
flatten
ground
groundleveling
heap
heavy
heavyequipment
industrial
industry
land
large
meliorative
motion
operator
power
reclamation
roadman
sand
shovel
site
soil
stones
swamp
track
tractors
travel
trucks
work
yellow