asphalt
black
city
communication
concrete construction
concrete trays
construction
construction site
day
ditch
drainage system
engineering
equipment
excavated trench
fencing
foundation pit
ground works
heating
heating main
heating system
heating systems
industrial
industry
infrastructure
iron
laying
metal
outdoor
pi pipe
pipeline
plumbing
reconstruction
renovation
repair
road
roadway
sand
street
system pipeline
technology
trays
trench
tunnel
underground
underground utilities
utility industry
water main
work
定額
Underground communications. Heating pipes in reinforced concrete trays. Reinforced concrete trays for laying communications are laid in the excavated trenchの素材 [FY310183637808]
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