機器
activity
aerial
backhoe
belt
big
black
blade
blue
browncoal
bucket
build
bulldozer
cast
coal
construction
conveyor
cut
development
digger
digging
dozer
earth
equipment
excavating
excavation
excavator
ground
heavy
hollow
industrial
industry
land
large
loader
machinery
metal
mine
mover
pit
power
quarry
sand
scoop
shovel
soil
teeth
vehicle
working
yellow