機器
backhoe
building
bulldozer
cement
concrete
construction
contractor
development
digger
digging
drain
drainage
earth
engineer
engineering
equipment
excavation
excavator
foreman
ground
group
heavy
hydraulic
industrial
industry
labor
land
loader
machinery
pipe
road
safety
sand
scoop
shovel
site
soil
system
team
tractor
trench
uniform
vehicle
water
work
worker
定額
Engineer wear safety uniform examining excavation concrete Drainage Pipe and manhole water system underground at construction site.の素材 [FY310155418999]
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