boiler room
central heating
central heating system
closeup
communications
construction
energy
equipment
frost
gas
ground
heat
heat supply
heating
heating pipes
heating season
hot
industrial
industry
infrastructure
insulated
metal
metallic
nature
outdoor
pipe
pipeline
pipes
piping
plant
reservoir
service
sewer
stream
sunset
supply
support
systems
technology
thermal
transfer
transit
transmission
transportation
transporting
tube
tubing
water
water supply
winter
定額
central heating pipes in a protective metal thermal insulation jacket laid above the ground on a cold winter evening at sunsetの素材 [FY310164763698]
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