機器
aqua
bacteria
bath
bathroom
brass
broken
calcification
calcified
calcium
carbonate
chrome
clogged
closeup
consumption
corroded
corrosion
corrupted
corruption
damage
decalcification
deposit
deposits
detail
drinking
drop
equipment
failure
faucet
fitter
hard
hard water
household
hydrology
kitchen
metal
mineral
old
plumbing
problem
quality
sanitary
scale
sediment
sink
surface
tainted
tap
water
white