英文關鍵字
bad
break
broken
burst
cold
condition
construction
damaged
emergency
energy
engineering
failure
freeze
frost
frozen
gas
goes
heat
heating
hot
ice
industrial
industry
into
leak
leaking
maintenance
metal
nature
nobody
old
pipe
pollution
problem
pump
pumps
repair
rust
rusty
service
snow
special
steam
stream
system
technology
tired
tube
valve
water
wet
winter
with
work