機器
action
activity
aggregates
backhoe
building
caterpillar
construction
day
development
dig
digger
dirt
earth
eathmoving
engineering
equipment
excavating
excavation
excavator
extraction
gravel
ground
heavy
hydraulic
industrial
industry
limestone
loader
mechanical
mining
mountain
mover
open
operate
outdoors
pit
power
quarry
railway
road
sand
scoop
shovel
soil
summer
technology
tractor
vehicle
work