機器
activity
broken
bucket
building
bulldozer
chain
clouds
coal
construction
crawler
dig
digger
dirt
earthwork
equipment
excavate
excavation
excavator
extract
gravel
ground
heavy
hydraulic
industrial
industry
load
loader
machinery
mine
mover
open
outdoors
pit
pneumatic
power
quarry
road
rock
sand
scoop
shovel
site
soil
standing
stone
work
yellow