英文關鍵字
background
broken
cement
concept
construction
corrode
corrosion
couple
crane
damage
dirty
drain
drop
energy
equipment
faucet
fix
flow
industrial
industry
iron
istribution
joint
leak
leakage
leaking
leaky
let
old
pipe
pipeline
pressure
pump
repair
rust
rusted
rusty
sanitary
steam
stop
tap
tehnology
transit
transmission
trickle
tube
tubing
turn
valve
waste
water