機器
backhoe
blade
breaktime
bucket
building
bulldozer
construction
development
dig
digger
dust
earth
empty
environment
equipment
erosion
escarpment
excavation
excavator
heavy
heavyduty
industrial
industry
job
loader
loading
location
machinery
mine
mining
mover
ore
outdoors
pit
power
quarring
quarry
rock
scoop
shovel
site
slope
soil
spatula
stone
technology
tractor
transportation
unloading
useful
vehicle
weel loader
wheel
work
yellow