英文關鍵字
background
blue
chrome
clean
closeup
concept
conservation
cool
defective
drip
drop
droplet
earth
ecology
environment
fall
faucet
flow
fresh
household
leak
leaking
liquid
macro
metal
nature
old
open
pipes
plumbing
preserve
protect
pure
purity
save
shut
sink
spigot
steel
tap
valve
wastage
waste
water