機器
activity
architecture
backhoe
bucket
build
building
bulldozer
business
construction
construction site
contractor
development
dig
digger
digging
dirt
earth
earthwork
engineering
equipment
excavate
excavating
excavation
excavator
foundation
ground
heavy
house
hydraulic
industrial
industry
job
loader
machinery
mover
pit
power
preparation
sand
scoop
shovel
site
soil
technology
tractor
transportation
vehicle
work