ball valve
ball valves
conduit
construction
culverts
damage
digging
dirty
ditch
drainage
drinking water
earth work
engineering networks
excavation
excavation works
filtration
foundation
ground
grunge
industrial
infrastructure
installation
installing
job
laying
mesh
municipal
network
pipe
pipeline
pipes
pit
plumbing
problems
pumping
reconstruction
repair
repair work
replacement
section
sewage
sewer
sewerage
system
systems
trench
underground
utility
water
work
定額
Laying underground storm sewers at construction site, water main, sanitary sewer, drain systems. Groundwater system for new residential buildings in the city. Ball valve background. Small sharpnessの素材 [FY310140441726]
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