機器
activity
backhoe
bailer
big
black
blue
brown
bucket
build
clay
closeup
construction
development
dig
digger
dipper
dirt
down
dredge
earth
equipment
excavate
excavation
excavator
fill
full
ground
heavy
hydraulic
industrial
industry
ladle
land
loading
mining
move
outdoor
pit
power
scoop
shovel
site
sky
soil
trench
up
view
work
yellow