abstract
angle
background
bend
big
blue
city
collector
concrete
conduit
construction materials
day
district
duct
economy
energy
engineering
equipment
heat
heat supply
heating
heating main
heavy
highrise
house
housing
industrial
industry
insulation
iron
line
manifold
metal
microdistrict
nobody
pipe
pipeline
piping
plant
power
pump
reflection
sewage
shine
sky
snow
steel
technology
transportation
tube
utilities
water
wide
winter
定額
Laying of heat-insulated large diameter pipes for hot water supply during the construction of a residential area. Pipes are insulated with special materials. Are above the ground.の素材 [FY31098425744]
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