機器
activity
backhoe
boom
bucket
build
bulldozer
construction
dig
digger
dirt
dolomite
dump
dumper
earth
engineering
environment
equipment
excavate
excavating
excavation
excavator
gravel
heavy
hydraulic
industrial
industry
loader
loading
machinery
material
mechanical
mining
mover
power
quarry
site
soil
tractor
truck
vehicle
work