機器
action
activity
backhoe
blue
blue sky
bucket
bulldozer
caterpillar
cloud
construction
day
digger
dirt
dredger
duty
earth
equipment
excavation
excavator
ground
heavy
hydraulic
industrial
industry
loader
loading
machinery
mover
moving
power
scoop
shovel
side
site
sky
soil
vehicle
wheel
wide angle
work