英文關鍵字
buried
civil
connect
day
duct
heating
insulation
isolation
joint
laying
main
network
open
people
pipes
plant
preparing
progress
project
repair
season
sidewalk
silver
street
summer
system
thermal
trench
walk
work
英文關鍵字
buried
civil
connect
day
duct
heating
insulation
isolation
joint
laying
main
network
open
people
pipes
plant
preparing
progress
project
repair
season
sidewalk
silver
street
summer
system
thermal
trench
walk
work