機器
arm
backhoe
bucket
build
builder
bulldozer
construction
destruction
development
dig
digger
dirt
earth
engineering
environment
equipment
excavate
excavating
excavation
excavator
gravel
heavy
hydraulic
industrial
industry
job
loader
machinery
manufacturing
mechanical
mining
power
rock
sand
scoop
shovel
site
soil
track
tractor
transport
truck
urban
vehicle
work