機器
activity
backhoe
bucket
build
bulldozer
construction
danger
demolition
destruction
development
digger
dirt
earth
equipment
excavating
excavation
excavator
gravel
heavy
hydraulic
improvement
industrial
industry
laborers
loader
loading
machinery
male
mover
outdoor
outdoors
outside
repair
road
rock
sand
shovel
site
soil
street
technology
tool
tractor
truck
underground
vehicle
work
worker
yellow