機器
build
channel
circular
connect
construct
construction material
construction site
covid
development
duct
energy
engineering
factory
fix
group
heavy
hole
improvement
industrial
installing
job
layer
long
maintenance
manufacture
material
no people
pipe
pipeline
plumbing
preparation
produce
production
ring
round
row
sanitary
second wave
site
stack
stock
structure
sunlight
supply
tool
tube
tunnel
underground
worker
定額
Stack of concrete drainage pipes for wells water discharges laying an external sewage system at a construction site outdoors warehouse. Civil infrastructure, industry manufacturing of cement productsの素材 [FY310153353817]
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