機器
arm
bucket
bulldozer
claws
coast
construction
detail
dig
digger
dozer
excavate
excavation
excavator
gravel
ground
heavy
hill
hydraulic
industrial
industry
iron
machinery
metal
moving
orange
outdoor
pebbles
piston
plunger
power
quarry
recumbent
resting
rusty
sea
shovel
site
sky
soil
vehicle
white
work
yellow