機器
aggregate
architecture
barrier
block
breakwater
build
bulldozer
coast
coastline
constructing
construction
dig
digger
dirt
earth
earthmover
engineering
equipment
excavator
heavy
hydraulic
illustration
industrial
industry
loader
machinery
protect
road
sand
scoop
sign
site
stone
street
tractor
transport
truck
vehicle
water
wave
work
worker
yellow